Am I right to guess that yours is an official build? and was the phone bought from Murena?
Only if yes, you will be able to get the best advice from the helpdesk.
Looking at official builds /e/OS official starlte download (you have to click on the earlier Android versions 10 + 11 to reveal contents) we see that a number of ROMs were reissued in March 2025. I assume these were released to try to provide an “Upgrade path” for users who had perhaps missed updates and Android version Upgrades during the outage. So it is possible that you received an Android version Upgrade 10 → 11 or 11 → 12. (??).
It did work in 10 for sure.
What version is shown on your e-Revovery screen?