JQL does not have a means for users to be able to search for which issues have been added or removed from a sprint.
Create a new JQL function that can do this natively
It would help identify these issues in searches, but also then could be very useful on board say as a quick filter to see very fast which issues were added after the start of a sprint.
This is something that 3rd party plugins have already achieved, such as Scriptrunner in https://scriptrunner.adaptavist.com/latest/jira/jql-functions.html#_addedaftersprintstart
It could be useful to be able to search for issues that were added or removed from a sprint during it's progress.
A customer even tried to get help from Script Runner support, but the according to the support, the respective function that could return that result is available only to the Server version of Script Runner.
It would be great to have it built natively.