Requirement
Sharing custom model driven app with user using specific security role.
Details
Let's say we have created a new security role called HIMBAP QA in our model driven app and we want to share our custom model driven with user with this security role assigned. So let's try that.
Step 1
Navigate to https://make.powerapps.com/, select your environment -> app -> Share
Step 2
Select user and try to share app using new security role
You will notice that security role is not available under the drop-down. To bring your security role under this list first you have to share your app with that security role using below steps
After that try again step 2 and now you should be able to see new security role listed while sharing app with that user.
Summary
In order to use new security role while sharing app with the user, first we need to add our new security role to the app.
Hope it will help someone !!
Keep learning and Keep Sharing !!