The Pixel 10 devices (excluding the 10a) are getting a bootloader update in one of the future Android releases that increments the anti-rollback version for the bootloader.
This means that, after upgrading, you won't be able to downgrade to a lower version of Android. You might need to sideload a full OTA image again to avoid bricking in certain situations.
By the way, we're working on Pixel 11 leaks and a chemical element (13), stay tuned!