We are pleased to announce that an unofficial build of the /e/OS is now available for the CMF Phone 1.
You can find more details
https://xdaforums.com/t/rom-alpha-tetris-14-e-os-for-cmf-phone-1.4692763/
Regain your privacy! Adopt /e/OS the deGoogled mobile OS and online services
Many thanks for the effortsđź‘Ź.
A question to the /e/os team: are there also plans to add this to the officially supported devices?
We will wait for the final builds before deciding on that. The builds have to be stable, all functionality should work. No major bugs, especially hardware related or device specific.
Hi
Thanks for this great job.
Unfortunately Bluetooth audio is not working, Bluetooth keyboard no problem
Thanks
Feedback shared with the ROM maintainer /developer
Maybe also interesting, there is a github repository for the Nothing Phone (2a)
Maybe worth a try for the Murena team?
Pretty hyped for this, hope the remaining issues can be resolved. 
Right now the Download links in XDA Forum seem to be broken. I suppose thats connected to the current outage. Take your time with this, i just wanted to make sure the information gets to the right place. Also left a comment on XDA Thread.
The Instructions & Downloads (alpha) are now on /e/ OS Page
https://doc.e.foundation/devices/tetris
What currently doesnt work yet:
-Fingerprint
-NFC (NO, my bad, the phone doesnt have NFC xD)
Those would be really nice to have.
-Haptics (less important in my eyes, id turn it off anyways xD )
Besides that i havent noticed anything.
Im daily driving it now. (But ofc have a backup device)
Not exactly sure yet, if bootloader relocking works, im afraid to try.
If relocking the bootloader is technically possible, then a custom AVB key is required, which is not (currently) included in the e-2.5-u*.zip file.
The trtris /e/ documentation also does not say a word about relocking bootloader: In comparison Google Pixel 5 - Locking the bootloader
From this it follows for me: relocking the bootloader is not supported. If it is tried, the restart will at best end in a bootloop, at worst the CMF 1 will be bricked.
The Murena CMF Phone 1 comes with an unlocked bootloader.
I also just noticed that Wifi Calling does not work.
VoLTE is working tho.