Hi @GoodResource ,
So you are referring to the Apps and Help buttons on the left panel of Teams, right? If this is the case, I am afraid currently there's no setting or option available from either the Teams admin side or the end users side to hide/remove them.
Given this situation, I just tried submitting it via the dedicated feedback portal for Microsoft Teams. Below is the link of the post so that you or others who see our discussion here can also add vote or comment there. Hopefully this can be realized in the future.
Hide/remove Apps and Help icon on the left hand panel
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