Doesn't work in 2.28.0a0 or 2.29.0.dev0 either. Missing the register. maybe it's got to be ported to the new(er) APIs?

Probably an oversight. Do you want to send a PR to add the backend to the list in

src/python/pants/bin/BUILD

? That will make sure it gets included.

i'm not sure that's the problem. That's what was done last time this came up (by you!, thank you 😃 ) but i think the plugin in 2.28.0a0 is complaining about no pants.backend.experimental.docker.lint.trivy.register module