Battery drain issues - any OCLP suggestions? (2016 12" MacBook)

I have a 2016 12" MacBook (m3, 8 GB). I had Sequoia on it and reverted to Sonoma which has proven to be substantially more performant.

Now, however, I've noticed what seems like worse overall battery on standby in particular. Like 15-20% drain overnight. Battery health isn't horrible (around 82%) so not perfect but hardly at a "service battery" point for a secondary travel laptop.

Any way to improve battery life when it's asleep? Not sure if there are OCLP tweaks I should/could enable to improve things, or any other general macOS recommendations.