[Jnr]

I do exactly that in my container build pipelines and it is great. And then CI uploads those SBOMs to Dependency Track.

Depending on the language, scanning just the container is not enough, you for sure want to scan the lockfiles for full dependency list before it is compiled/packed/minified and becomes invisible to trivy/syft.

[Lvl999Noob]

You are building everything in CI from scratch so theoretically, it should be completely possible to not need to scan lockfiles and get all the data from their respective sources (OS, runtime, dynamic libs, static deps, codegen tools, build time deps, etc)