PIP doesn’t work on iPad Pro (11inches)
How do I use picture in picture mode for iPad Pro?No home button. I have it updated to latest iOS and turned on the multitasking option on settings.
iPad Pro, iOS 13
This feature is usually linked with third-party video streaming/player Apps - and with media playing it is often then possible to invoke a PIP screen. Each App will have its own way of triggering this feature.
You might also find the User Guide will offer some insight into features and operation of iPad and iPadOS. The User Guide (both download from Apple Books - and an online version), can be found here:
https://support.apple.com/en-gb/guide/ipad/ipadf3dbb83f/ipados
I hope you find this to be helpful to you.