Hello,
I am planning to split 5.7.x series on its own git branch 5.7 on Thursday, May 4, 2023.
After that, master branch will be open for new features (to become part of 5.8 or what ever version will be decided to be next). Usually testing should continue for branch 5.7 for another 1-2 weeks, then, if no relevant road blockers pop up, we should release 5.7.0 as first stable version in the 5.7.x series.
Cheers, Daniel