Hi
Looks like something has been changed recently as you mentioned in step 8.
Scenario 2 - https://techcommunity.microsoft.com/t5/azure-paas-developer-blog/usage-of-custom-rbac-roles-in-azure-api-management/ba-p/1560571
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The ability to read subscription keys from products (an action which is defined as Microsoft.ApiManagement/service/products/subscriptions/read) is allowed by default for users having the 'API Management Service Reader Role'. Same is the case for navigating to the keys via APIs/subscriptions.
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The API Management Service Reader Role' use to allow to view the API subscriptions of products , however from august 20 this feature is not available or some updates happend with new developer portal updates .
We had an user in our environment with API Management Service Reader Role' access to APIM and he was able to view the subscription keys .
Now all of sudden without any changes to permission he is not able view the keys and he can not perform the API call test from the APIM portal.
Would you be able to confirm , if there any changes happend recently from MS . which could have triggered API subscription key access.