My roku mobile app doesn't have the Screensaver on it and I even update the app and it still not up there. Is there another way for me to use my photos from my phone as a Screensaver for my tv.
What model Roku do you have? I just checked the app while connected to my Ultra 4800 and the screensaver option is there. I checked a couple of other Rokus on my network and it's there for all of them as well. Your screenshot looks different than mine, so perhaps you're using an Android phone. I'm checking on an iPhone.
Even when I did have my iPhone the Screensaver wasn't there.
I have roku express+ with 1080 HD
The "cast screensaver" function (using Play On Roku) of the Roku Remote Control app only works with 4K models.
Unfortunately this isnt documented, so you are left wondering why you are missing this functionality with your HD model.