The image map editor needs Modern-style icons. Currently, it uses classic, and doesn't exactly look good.
Marlon/German, do these icons even exist?
No, those icons do not exist yet for Modern, but they will.
Themes Triage Team marking dup *** This bug has been marked as a duplicate of 54760 ***
Verified dupe of bug 54760: "[Modern] Composer Image Map Editor needs new icons"