Ah yes… @Nevada_545 nailed that one. I do like me those push centers. They are kind of the “Lexus” of plastic rivets.
The Yugo would be the barbed style…push in, pry out
The Caddilac would be where the center pin pulls up and out instead of inward…
Or something like that.
I dont spend an iota of time trying to remember plastic rivets or fasteners but over the years I suppose that learnin just sort of creeped in… Only takes a few moments to figure out…and I guess it helps to have seen them before as they are designed NOT to be intuitive.