Coverage Badge from latest Merge Request pipeline job

How to create a badge whose badge URL link comes from the latest merge request pipeline job on develop?

When using a specific merge request number (10) for the badge URL, the display of test coverage is OK :

Now, when I want to use the coverage issued from the latest merge request pipeline from a feat branch into develop, I can’t find the proper way to target the merge request job…

I’m using a company hosted Gitlab.
Thank you in advance,
Best,

Ben