Johnnyloans Besides, put it back to stock before sending it back for warranty
No need to flash stock OS, you can send in the phone for repairs with GrapheneOS installed just fine. Some community members did this and had no issue aside of Google flashing stock OS on top of you GrapheneOS before sending your fixed device back to you. So backup before sending the device for repairs.
OliverTwist decided to buy an XL model
10 Pro XL here and it's awesome. No issues. As happy as a nice device can make me :)
OliverTwist i like to watch movies
Slap a PixelSnap Ring on it and you're good to go.