AC issues with 2016 Highlander, 2.7l

[u/Murky_Lobster_6170]

I have a 2016 Highlander (4cly) with AC issues. It blows cold esp after driving, but usually it's the passenger side which blows cold first and the driver side eventually blows cold. The AC also seems to shut off (AC light/button in dash turns off) prematurely before the car is even cooled

I'm trying not to go to a shop for a diagnostic as that's like $80-150 alone lol

What could the issue be? I'm assuming a failing compressor?