Why don't I get fullscreen in books after 15.0 update on iPad?

I got the same problem and I found the solution. The problem was Accessibility settings changed during "External Keyboard support tests". So when I change back this option "Settings > "Accessibility" > "Keyboards" > "full Keyboard Access" to "Off" > after that Full screen mode in iBooks come back :) I hope it helps. My IOS 15.0.2 > iPhone 12 Pro Max :) So it looks that Apple change something in external keyboard support but forgot to disable it in iBooks xD

I have the same problem. I tried delete books app, reboot iphone and iPad (I have problem on two devices).

I talked with apple support but that couldn't solve the problem for me

Tried the same thing, worked on the iPhone, not the iPad.

really ****** with this bug

I stoped using Books on iPad and iphone. Apple can’t solve problem more then month.

Thank You! It helps me finally! I so glad. Thanks again.

My savior! Thank you 🙏🏼 😉

Thank you so much!!!

Dzenkuja, brat.

T h a n k u s o m u c h !

I do thank you. My problem is completely eliminated

Thank you so much. You have no idea how relieved I am!