OK. So you need to use the Office 365 Groups connector to read the group members list.
From memory, you're then going to use an If something like this:
If(IsBlank(Filter(Office365Groups.ListGroupMembers("GROUP ID GOES HERE").value,mail=User().Email)),"Not an approver","Is an Approver");
Your tenant admin can tell you the Group Id (office.com, open Admin, Groups and Users, Active Groups, select the group, look for a GUID in the URL).
Breaking that apart from the middle out
Filter(Office365Groups.ListGroupMembers("GROUP ID GOES HERE").value,mail=User().Email)
That part filters the members list of the group to just the people whose email address is the same as the logged in user (which in practical terms means to just that user).
IsBlank() determines whether there's anything in that list. If there is then the user is an approver, if not then they're not. And the If then simply switches the behaviour accordingly. I've used simple text but I guess in your scenario you're going to either use it on the visibility of two different buttons, or switch the OnSelect formula of a single button.
I hope that helps. It's untested and from memory so it might need a bit of tweaking. If it does work, could you mark this as an answer? Thanks
Nick
