It's probably worth trying. I gather 5g on early phones is rough on batteries, but my phone is a 2023 and battery life seems fine with 5g on. (old phone was 2020 moto g power, new phone 2023 moto g stylus 5g).
If 4g only makes your phone get stuck searching for signal and 5g would find a signal, turning on 5g will help
If 4g only makes your phone get stuck searching for signal and 5g would find a signal, turning on 5g will help