Chosen Solution

Hey, the phone I’m working on is missing the logic board ground clip. Is it okay to not replace it?

Missing what logic board ground clip? No picture, no context, it’s really hard guessing which part you are talking about. Most of the “ground clips” are actually signal feed clips, if you lose one, you lose part or all of the RF functionality for that antenna, for example cellular/wifi primary/diversity antenna, GPS, Bluetooth, NFC, depending on which one you lose.