You're using the outdated fabric ID for Fabric API. While Fabric API still "provides" the fabric mod ID for compatibility, it's not clear what it is, so you should use the fabric-api mod ID.

Ref. https://github.com/wisp-forest/owo-lib/blob/1.21.4/src/main/resources/fabric.mod.json#L46

https://github.com/wisp-forest/owo-lib/blob/1.21/src/main/resources/fabric.mod.json#L46