Is there a generalized way to give another address access to a specific function on a contract? For example, I have a utility NFT and I want to give another address access to call specific functions on it.

Perhaps a Gnosis module? Or is there a generic proxy with permissions contract?

playing /bracket, assisting /bracky, talking /greatbooks

have you looked at OZ’s access control module? You can programmatically grantRoles with it too…

https://docs.openzeppelin.com/contracts/4.x/access-control

I meant for an existing contract. Say there is a utility NFT already deployed, and I own token 42. I want to give your address permission to call doThing(42) on my behalf without transferring the token to you.