I think it’s a very usefull option for Plexamp users, some users including me vote for it in that post, but not many people was interested 
In my case, I use a music widget for PocketCast and Apple Music everyday, I have both in my iPhone Home screen within a rotate Widget it would be fantastic to have one for PlexAmp.
Some time ago @elan answer here: “not at the moment.“
I hope this moment will be closer 
