Thanks to @bleeptrack's suggestion, i now have an e-ink lunar-phase display on a twenty-four hour analog watch.
@th @bleeptrack That‘s a nice watch! Is it possible to throw Alexa out?
@fnord @maumau @bleeptrack gadgetbridge has been ok with patched version for gen 6 support: https://codeberg.org/Freeyourgadget/Gadgetbridge/pulls/2775
sometimes `adb` is able to reinstall watchface automatically, occasionally requires phone reboot to reconnect. haven't tried the alexa integration.