I finished the prototype of an electromagnetic pendulum drive clock. It uses the electronics from a US$4 pendulum drive module. The only change needed was to run it with 3V to adjust for the extra friction from the ratchet pawls. The first overnight run was accurate within about a minute, although it can probably be tuned to within a minute per week.
Electromagnetic Pendulum Clock - YouTube
The design still needs a round of fine tuning and an assembly manual before posting to MyMiniFactory. Hopefully, it will be ready in January 2022.
Steve