Can a complication/widget render a continuously animated custom graphic (watchOS)?

Can a complication/widget render a continuously animated custom graphic (watchOS)?

I design abstract, number-free clock faces (see rhei.watch for examples — canvas-based, continuously animated) and I’m exploring whether something similar could work on Apple Watch.

Since watchOS doesn’t allow fully custom third-party watch faces, I’m trying to understand what’s actually possible within the current constraints:

Can a complication or widget render a continuously animated, custom canvas-style graphic — not just static icons/text/SF Symbols — similar to what’s possible with iOS lock screen widgets?
Is there any path today for a third-party app to offer a watch-face-like experience, even without literally replacing the system face (e.g. via Smart Stack, a full-screen complication, Live Activities on watchOS, or something else I’m not aware of)?

Any pointers to the right documentation, sample code, or past discussions would be really helpful before I invest time in building this.

Thanks!
Thomas