Thank you for your answer!
Editing the code is a bit scary. We decided to load CSS using other plugins.
For me who are not very familiar with WordPress, your plugins are very useful.
I have another idea.
In addition to version control queries, this problem could be solved by using the following folder structure so that arbitrary CSS file names can be used, and a system where the user updates the file name every time it is updated.
ex. / (theme) / blocks / (myblock) /css/x-x-x.css
