Have you tried doing a system clear cache? We have lots of members reporting the battery drain problems, but Mine lasts even longer than it used to be after the beta update. Dunno why
I noticed switching to protect battery option my battery lasts nearly 3 hours longer when it charges and locks at 85% than it would normally at 100% so, the protect battery option was very well helping the battery life but also switching to 60hz instead of 120hz since 120hz right now is not working properly
Mine used to last longer before the beta now it last at least 6 hours to 8 screen on time. I have a Galaxy S21 Ultra 5G with 5000 mah of battery. So I don't know. But it seems like the beta has improved the charging time tho.