Restoration after immersion - what needs doing?
I'd consider replacing the shifter cables and housings, as this is a relatively low cost fix. Water will have seeped deep into the housings.

The hydraulic brakes are of course nominally sealed, but a bleed may be good idea in case water has got into the system. The braking system is obviously critical so I'd do it.

Water probably got past the fork seals. You don't want that sitting in the fork and the seals are not preventing it from coming out. If it's a coil fork it should come apart fairly easily (search youtube for videos), if it's air it's trickier. I notice there are service manual downloads on the Suntour page. You can also try contacting Suntour.