how to turn off airplay 2

First of all I have two iPhones an iPad a MacBook and four TV's. So when I play music on an app on my iPhone it opens automatically - which is fine I suppose. However when I stop playing via the app it still appears in the control center and there has been occasions where I cannot switch what ever I was listening to off (it continues to play on the iPhone). The only way to close the airplay and stop it playing it seems is to physically close the music app I am using and that stops it playing. I realise I can turn Airplay off on my TVs but that is annoying when I wish to send something via my iPad or MacBook. So really it becomes a nuisance thing and something that I feel I should be able to turn off (on my iPhone)

The other BIG problem I have with it is when I try a search function on Apple TV then a keyboard pops up on the iPhone - which is great and I love using that. However it also opens up a remote underneath that which comes up again when you swipe down (for notifications) I cannot turn that off or find out where it is but it does show up again in the Control Centre and again I cannot turn it off. I feel it is not needed and only chewing up my iPhone battery