Wrangler Went SWIMMING? (Battery Not Charging & Oil Pressure WARNING?)

This low-mile decked out 2010 Jeep Wrangler left the owner stranded...
Apparently the owner drove her Jeep through some DEEP water...repeatedly??
Shop says they tried 2 reman alternators and it's still NOT CHARGING the battery.
Also the OIL PRESSURE WARNING light comes on for no apparent reason...
They cleaned out water from a few of the bulk connectors, but that did not help.
Let's see if we can get to the bottom of these issues and recommend a repair.
2023 LAUNCH X431 PRO3S+ (Upgraded ThinkTool PROS):
www.amazon.com/dp/B092894STV?...
ASTRO DC AMP CLAMP:
www.amazon.com/dp/B08MTCMWLB?...
TEST LIGHT:
www.amazon.com/dp/B000M5ZWBA?...
Enjoy!
Ivan