Since bug 59463 has been fixed in 7.2, inserting and deleting images is now recorded. We should add that information to the list in https://help.libreoffice.org/7.3/en-US/text/shared/01/02230100.html?&DbPAR=WRITER&System=WIN
Pierre F committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/help/commit/76c9502e7138e55ec47073c721ede98fc3d65229 add image to record change list. tdf#144206