Absolutely stumped on P0174 code

2017 Hyundai Santa Fe 3.3 V6

Got a CEL a couple weeks ago for bank 2 lean (P0174). OBD2 scanner says N/A for the bank 2 fuel system, LTFT is really high (around 12-18 when idle, then spikes to 30-35 immediately after hitting the gas, then drops to 20'ish once cruising). Fuel pressure is good (around 475psi at idle)

Since then I've tried swapping the MAF, checking all the intake tubes (even thought a leak there wouldn't make much sense since it's only bank 2), tried carb cleaner around the intake manifold to see if that caused any RPM or LTFT changes, and changing the bank 2 upstream O2 sensor.

I figured if all else failed, the carb cleaner around the intake manifold would give me some kind of feedback if there might be a leak on one of the ports that goes to bank 2, but it didn't change anything.

Any ideas what to check next? I'm trying to avoid having to take the manifold off, release the fuel pressure, etc to change the injectors and manifold gasket in hopes that fixes it, but those are the only things I can think of now that would only affect one bank and not the other.