Welcome to the Forum, @seniorpro1.dv! 
My understanding of Cam OG’s (and Cam OG Telephoto’s) PiP capability is that it’s in-app-only and operates independently of the Android “Special app access” PiP feature. I’m unaware of any way to disable the floating window completely, but it can be collapsed, and the tab with the symbol that looks like a left angle bracket 〈 can be dragged to a different part of the screen to make it less obtrusive, but it will reappear in its default position the next time you open that camera’s live view.
It’d be kinda cool if there was a toggle in Cam OG’s settings that would disable the feature entirely or if that control would appear only when a user taps on the Live Stream pane (like how the microphone and speaker icons function). Even with only a single Cam OG, I still have that little PiP tab overlay, and on one hand that seems kind of silly (like the app should know that I have only the one Cam OG and shouldn’t even offer the PiP feature), but on the other hand, I can understand how that’s part of Wyze’s marketing, because if I open the tray and tap the “+” button I get a prompt to install another Cam OG or shop for one, so I can’t fault them for that.
Here’s a relevant Wishlist topic:
You can visit that to cast your vote (click the button above the initial post) and add your comments.