Supported Android versions: Android 10, 11 and 12.
ROM currently running: LineageOS 18.1, 19 and 19.1; Derpfest OS and many others.
Maintained: Yes
Current ROM status: OFFICIAL
XDA Forum section:
Device specifications:
https://wiki.lineageos.org/devices/heart/
As this device is officially supported by LineageOS v18.1, then it should be really straight forward to make an r build of /e/OS.
And it was quite straightforward 
Though the repo sync took 4 hours and the build took 24 hours.
Anyway, there is now an unofficial r build of /e/OS: see this post for details:
Enjoy, and please leave feedback
Thanks for the information.