The ARM64 installer will be part of the next 3.11 release, minus the py.exe launcher (which needs a chunk of work in issue46566) and Tcl/Tk (which needs upstream support for the platform) and hence IDLE.
I'm hesitant to make a final release without these components. At the same time, I'm concerned about other release blocking issues that may arise that are unrelated, so I do want to get releases out even without them so that we have a chance to discover them.
https://bugs.python.org/msg412010
https://www.python.org/dev/peps/pep-0664/
we're looking at a typical October release date