I suggest that you need to read Factory Images for Nexus and Pixel Devices | Google Play services | Google for Developers carefully to see why bluejay and other Pixel 6 are a special case.
Warning: The May 2025 update for Pixel 6 (6, 6 Pro, 6a) and Pixel 8 (8, 8 Pro, 8a) devices contains a bootloader update that increments the anti-roll back version for the bootloader. This prevents the device from rolling back to previous vulnerable versions of the bootloader. After flashing the May 2025 update on these devices you won’t be able to flash and boot older Android 15 builds.
The wording of this warning has changed more than twice in the recent past.