Is there a way to associate tag pipeline with a merge request?

We are using tag pipelines with build-* tags to build and test our application (we don’t need a build on every push, and definately don’t want to run our 2h plus testing suite, only if needed.

If we have a merge request open for the branch where we have the build- tag we would like to see the pipeline indicators and test results for the tag pipeline in the merge request somehow.

It is working if we use branch pipelines (as we do on our main branch), there we see the pipeline, the test results and everything correctly but for the tag pipelines we don’t see any indication that there is a pipeline.

I’ve looked up the merge request pipelines variables secition but there is no CI_COMMIT_TAG variable, only for tag pipelines.

Is it possible somehow?