I have a similar situation. My main work happens in the browser (I use Firefox), and my laptop is a Lenovo Legion 5 17IMH05.
I used to experience frequent system freezes, especially during active work.
Yesterday, I switched the power mode from “Performance” to “Balanced” — it’s been over 24 hours now, and I haven’t encountered a single freeze.
Previously, freezes happened quite regularly, so it seems the issue might indeed be related to the power mode.
I’ll keep monitoring it.