This is an active topic, mentioned for instance here Week 19, 2022 : Development and Testing Updates – /e/ may well have to drop support for devices without a ROM maintainer.
However we see a LineageOS device tree to Android 11 GitHub - LineageOS/android_device_samsung_herolte.
Edit I have been trying to get interest from /e/ users who do not want to take the full responsibility of a ROM maintainer, but who might be able to collaborate to provide /e/ devs with an extra degree of community device support for devices which are already maintained by contributors to a fully operational device tree (just like this device !)