Here’s an unofficial build for this device. Built from the v0.23.9-r tag.
This is completely untested so please backup your existing setup before flashing
Release notes are here:
Device details here
https://wiki.lineageos.org/devices/heart/
Installation instructions here
https://wiki.lineageos.org/devices/heart/install
TWRP Recovery 3.3.1-1 available here
https://drive.google.com/file/d/1Xt6xPeQ70rFtr0tLh3LpTC4y-vivfN2S/view?usp=sharing
I am not in a position to support this ROM as I don’t own one of these devices. If you do flash it, please give some feedback here, If enough people find it works, /e/ may be persuaded to make it an official device