Does your S10 still get security updates?

I have been prioritizing hardware choices for years (Xperia 5 III - charge limit, 3.5mm jack, microSD slot; LG V20 - same but removable battery) but I had to give the LG up due to lack of VoLTE support and the Sony’s fingerprint reader failed plus battery life seemed to be deteriorating - and both lost any kind of software support years ago. I finally caved and begrudgingly bought a Pixel purely for the 7 years of software support and GrapheneOS

Oops, right you are. I had googled it and found discussions saying Graphene didn’t support the native implementation but I just tried long pressing the flashlight and it works fine

Check out FlashDim on F-Droid: variable brightness on your flashlight