There's a very simple solution to that, if your systems & processes are reasonably lightweight.

Just build and deploy everything on every merge. Compute is fairly cheap, and if running in parallel, it doesn't have to take long.

You can also take it a step further and have "mono" binaries/container images, where you specify the service to execute as the first argument.

I've been doing this for about 5 years now, having a single output artifact for each language being used. It works great.

If you're careful about your optimisations, you can go from hitting the merge button to having 100+ services deployed on production in about 60 seconds

Arguably it's a bit of an extremist approach, but if you have a situation where technically you're deploying thousands of times a day, you get pretty good at making the process reliable and robust