How To Add To Playlist?

I’ve loved Plex and been a lifetime Plex Pass user for years. Years. But this new update, OMG. I hate it. I’ll be looking for something else. For all the reasons that have been mentioned in all these threads. This is ridiculous.

For example - and maybe I’m missing something, though I think I’ve looked everywhere, but how do you now add a movie or TV show to an existing Playlist? Used to be you clicked a context menu at the item and chose “Add To Playlist”. This new interface says something like “More Options Available In The Mobile Version”. Oh, great. I paid extra for the Fire TV Cube with a wired ethernet cable back to my router for the fastest possible performance, and you want me to control this from my phone? Am I misunderstanding something??