Drop compatiblitiy with Drupal 9 version

Is there any current limitation or extra effort to keep the compatibility with Drupal 9?
In case not, I suggest extending the compatibility as this module is useful for migration planning from Drupal 9 to 10/11

Yes, I am I agree with @gedur. One of the contexts in which Xray is very useful is in legacy or highly outdated projects; in fact, we encountered one of these issues a few weeks ago.