Here's some info on the Pixel 10 if you haven't already seen it
https://grapheneos.social/@GrapheneOS/115102473921005918
We've received the Pixel 10 we ordered and have confirmed it supports unlocking, flashing another verified boot key and locking again.
Our Pixel 10 support will likely only be possible to complete after we finish porting to Android 16 QPR1 which is being released in September.
I'm using GrapheneOS on a Pixel 6a (yes, I know its an old phone) and I love it. I had a Motorola phone before running stock Android and it was junk. GrapheneOS is 100% worth the switch :)