Can’t exit videos after viewing in Facebook etc..

I can not get my back / exit button to exit me out of videos while I’m in Facebook or viewing YouTube from it. I can’t exit anything. Ive found a few articles but they reference hitting the home button twice to reset it. I have the Pro 12 iPhone and it doesn’t have a standard home button. Double tapping the button on the side isn’t doing it. I can’t just close the videos as I preview a lot of videos for post approvals. It just started the past few days ago and it hasn’t done it since I got the phone 5 months ago. I have rebooted several times and even turned off auto

video play. Nothing is working. I am attaching a photo of the button that appears to act like it’s disabled now.