I mentioned this elsewhere but I really like hybrid smart watches for this - battery on my withings scanwatch goes 20 days, does notifications OK, activity longing, sleep tracking, HR monitoring.

Features I'm missing from galaxy watch are find my phone and answering phone on the watch, but it's so much lighter I don't need to take it off (the bulky strap on my galaxy watch would bother me when resting my hands on laptop edge), and it's very low key - I can wear it in any setting. Smart watches look like toys to me TBH.