I don't see that as odd. It looks like it was released at about the same time that zstd was getting added to filesystems, and a little bit prior to when IBM acq

I don't see that as odd. It looks like it was released at about the same time that zstd was getting added to filesystems, and a little bit prior to when IBM acquired Red Hat. It's quite possible that IBM decided that "little" things like enhancing LVM aren't worth the money.