Panic log help: 16+ battery stuck at 1%, stops charging when booted

Hello, I was hoping someone could help me decipher the panic log on an iPhone 16 Plus. The phone charges normally when first plugged in, but stops charging as soon as it's fully booted (the charging icon still shows up, but no power is going to phone) and the battery indicator always shows "1%". It then crashes after ~3min.

I've already replaced both the battery and the charging port (with aftermarket parts from IG), but neither has impacted the behavior of the device.

I believe the relevant part of the panic log is here:

"panicString" : "panic(cpu 0 caller 0xfffffff03eba9a94): SMC PANIC - ASSERT: target\/d48a\/target.cpp:248: 0, SMC BSC failure, TB0T SBAP\nspreadsheet ver(*10) 110\nS.sensor array 0 - 7 is 169, 0, 0, 0, 0, 0, 0\nF.sensor array 0 - 1 is 0\n\n - Misc(2) OUTBOX1 not ready\nASSERT: target\/d48a\/target.cpp:248: 0, SMC BSC failure, TB0T SBAP\nspreadsheet ver(*10) 110\nS.sensor array 0 - 7 is 169, 0, 0, 0, 0, 0, 0\nF.sensor array 0 - 1 is 0\n\n\nRTKit: root

As far as I understand, the "SMC BSC failure" indicates a sensor not communicating with the SMC, and the "TB0T" lead me to suspect the battery. However, the behavior is identical with the original battery and the replacement battery. There's no obvious liquid or physical damage to the device.

Anyone know what sensor is being indicated, or what the issue is if I'm totally misreading it? I can post more of the log if helpful. Thanks so much,

Henry Chung