As of Carpet Mod 1.4.40 and Minecraft 1.17, Glow Item Frames are classified as a living entity (just like pig, zombie, player, and armor stand), but that classification does not extend to regular Item Frames. This may be a vanilla bug, but I'm reporting here because the bug is most easily seen with Carpet mod installed.

To reproduce, just run /script run entity_types('living') in chat and notice the output list, which contains "glow_item_frame" but not "item_frame".