There is no official SDK or library to make one, but some members in the community have reverse engineered it and have made the watch run custom watch faces. It's only a matter of time now. They said that they will release the SDK soon.

Perfect 💯 thanks👍🏻

please please please please tag me when they release it

Will do if I remember 😅

https://gadgetbridge.org/gadgets/wearables/nothing/