This change was requested by @kaichi1342 and others here. You can check the discussion here - Can I set up Mirror View [M] to flip on cursor instead of screen center?
@AlansArtLog implemented it in this Merge request - Add "Mirror Canvas Around Cursor" action (!994) · Merge requests · Graphics / Krita · GitLab
it was a year ago. In the merge request @AlansArtLog mentions that the mirror button in the overview docker has mirror around canvas as it is and only the popup palette has been changed. So perhaps you can use the button in the overview docker as a workaround?
Let us also wait to hear about this from others.