diff --git a/changelogs/fragments/1270-elbv2-fixes.yml b/changelogs/fragments/1270-elbv2-fixes.yml
new file mode 100644
index 00000000000..5da7d386699
--- /dev/null
+++ b/changelogs/fragments/1270-elbv2-fixes.yml
@@ -0,0 +1,3 @@
+bugfixes:
+  - module_utils/elbv2 - respect ``UseExistingClientSecret`` parameter in ``authenticate-oidc`` rules (https://github.com/ansible-collections/amazon.aws/pull/1270).
+  - module_utils/elbv2 - fix change detection by adding default values for ``Scope`` and ``SessionTimeout`` parameters in ``authenticate-oidc`` rules (https://github.com/ansible-collections/amazon.aws/pull/1270).
\ No newline at end of file
diff --git a/plugins/module_utils/elbv2.py b/plugins/module_utils/elbv2.py
index 533fd75e23d..f63dc3f3653 100644
--- a/plugins/module_utils/elbv2.py
+++ b/plugins/module_utils/elbv2.py
@@ -92,16 +92,31 @@ def _prune_ForwardConfig(action):
     return newAction
 
 
-# the AWS api won't return the client secret, so we'll have to remove it
-# or the module will always see the new and current actions as different
-# and try to apply the same config
+# remove the client secret if UseExistingClientSecret, because aws won't return it
+# add default values when they are not requested
 def _prune_secret(action):
     if action['Type'] != 'authenticate-oidc':
         return action
 
-    action['AuthenticateOidcConfig'].pop('ClientSecret', None)
+    if not action['AuthenticateOidcConfig'].get('Scope', False):
+        action['AuthenticateOidcConfig']['Scope'] = 'openid'
+
+    if not action['AuthenticateOidcConfig'].get('SessionTimeout', False):
+        action['AuthenticateOidcConfig']['SessionTimeout'] = 604800
+
     if action['AuthenticateOidcConfig'].get('UseExistingClientSecret', False):
-        action['AuthenticateOidcConfig'].pop('UseExistingClientSecret')
+        action['AuthenticateOidcConfig'].pop('ClientSecret', None)
+
+    return action
+
+
+# while AWS api also won't return UseExistingClientSecret key
+# it must be added, because it's requested and compared
+def _append_use_existing_client_secretn(action):
+    if action['Type'] != 'authenticate-oidc':
+        return action
+
+    action['AuthenticateOidcConfig']['UseExistingClientSecret'] = True
 
     return action
 
@@ -996,9 +1011,10 @@ def _compare_rule(self, current_rule, new_rule):
             current_actions_sorted = _sort_actions(current_rule['Actions'])
             new_actions_sorted = _sort_actions(new_rule['Actions'])
 
+            new_current_actions_sorted = [_append_use_existing_client_secretn(i) for i in current_actions_sorted]
             new_actions_sorted_no_secret = [_prune_secret(i) for i in new_actions_sorted]
 
-            if [_prune_ForwardConfig(i) for i in current_actions_sorted] != [_prune_ForwardConfig(i) for i in new_actions_sorted_no_secret]:
+            if [_prune_ForwardConfig(i) for i in new_current_actions_sorted] != [_prune_ForwardConfig(i) for i in new_actions_sorted_no_secret]:
                 modified_rule['Actions'] = new_rule['Actions']
         # If the action lengths are different, then replace with the new actions
         else:
diff --git a/plugins/modules/elb_application_lb.py b/plugins/modules/elb_application_lb.py
index 08d62a7bf10..37b3b35a7ea 100644
--- a/plugins/modules/elb_application_lb.py
+++ b/plugins/modules/elb_application_lb.py
@@ -142,6 +142,9 @@
               - A list of ALB Listener Rules.
               - 'For the complete documentation of possible Conditions and Actions please see the boto3 documentation:'
               - 'https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/elbv2.html#ElasticLoadBalancingv2.Client.create_rule'
+              - >
+                Keep in mind that AWS uses default values for parameters that are not requested. For example for I(Scope)
+                and I(SessionTimeout) when the action type is C(authenticate-oidc).
             suboptions:
                 Conditions:
                     type: list
diff --git a/tests/unit/module_utils/elbv2/test_prune.py b/tests/unit/module_utils/elbv2/test_prune.py
index 3a80bf58df8..3a02b9e2e49 100644
--- a/tests/unit/module_utils/elbv2/test_prune.py
+++ b/tests/unit/module_utils/elbv2/test_prune.py
@@ -109,6 +109,9 @@
         TokenEndpoint='https://idp.ansible.test/token',
         UserInfoEndpoint='https://idp.ansible.test/user',
         ClientId='ExampleClient',
+        Scope='openid',
+        SessionTimeout=604800,
+        UseExistingClientSecret=True,
     ),
 )
 oidc_actions = [
@@ -121,6 +124,8 @@
             UserInfoEndpoint='https://idp.ansible.test/user',
             ClientId='ExampleClient',
             UseExistingClientSecret=True,
+            Scope='openid',
+            SessionTimeout=604800
         ),
     ),
     dict(
@@ -132,6 +137,7 @@
             UserInfoEndpoint='https://idp.ansible.test/user',
             ClientId='ExampleClient',
             ClientSecret='MyVerySecretString',
+            UseExistingClientSecret=True,
         ),
     ),
 ]