Add the Make Compound Path icon back to the Properties panel
A couple years ago, there was an icon (below the pathfinder tools) that appeared in the properties panel when you had multiple items selected - Make Compound Path. A subsequent update removed that tool from the properties panel. Release compound path is still available right there in the properties when the selected object happens to be a compound path. Some people suggest just using the pathfinder Union to make a compound path, but it's definitely not the same thing as making a compound path (pathfinder union on non-connected items makes a group, not a true compound path - they're not the same thing).
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I checked all the major versions of Illustrator until 2020, starting from Ai CC2018, where Properties panel was introduced, and none of these has the Make Compound Path button you refer to (and I can’t remember seeing it there ever)...
The 'Release' button in the Quick Actions section indeed exists in all of them and does now, but not the 'Make' one.
Still, having one makes sense for me, so I added a vote for this one.