It's met the same fate as so many cable outlets where the name hardly reflects what's on the channel anymore- MTV, CMT, AMC, etc. Up until recently, people wanting actual animal-centric programming could find it on Nat Geo WILD, but after the Disney acquisition, the only thing I ever see in the channel guide for WILD is some slap-dash "animal edition" of America's Funniest Home Videos. So you could even add Nat Geo WILD to the list.
I think it's a testament to the fact that people who want that animal-focused content are going to find it elsewhere, likely on-demand (be it Youtube or Discovery+ or somewhere else). Linear networks (especially not the "crown jewels", those at the lower end of a company's offering, like Animal Planet or MTV2) are becoming dumping grounds for reliable performing potato-chip content; reruns that folks will put on and leave on because they've seen it before. Any efforts for new or original programming on those outlets are long gone.