What buttons does the flipper zero use? also is there a specific port?

I splashed some water on my flipper zero like 4 months ago. opened it up cleaned it with 91% ISO Acohol and let it sit (battery disconnected) thankfully it came back to life but the back button wouldnt work and it wouldnt connect to ANY pc. but it would charge. I'm looking to contact a local gadget repair shop to see if they can replace those. is there a specific button model the flipper zero uses or usb c port? I know there isnt a parts shop yet but I want to see if I can get them from aliexpress or something.