Here are your options:
Tap theaAbutton to the left of the page’s URL, then tapHide Toolbar.
The toolbar will reappear the next time you close out of Safari.
Tap themenubutton at the top left of Safari.

This will collapse that menu and give you way more room to view web pages.
Tap thethree dotsat the top of the web client, then selectFull Screen.
Add the web page to the Home Screen.

This will create a shortcut to the page next to all your other apps.
When you tap the shortcut, it will bring up the website in Safari, ideally in full-screen mode.
This doesn’t work on all websites.

Another way to make Safari on iPad go full screen is with a bit of JavaScript.
you’re free to’t control which is which; it’s up to the app developer.
To watch a video in full-screen mode, tap the full-screen button on the video player.

If you’re viewing the video picture-in-picture, tap the right-corner icon showing two squares.
Does the iPad Go Full Screen?
At least, not in every situation.

Some apps allow it and others don’t.
Unfortunately, there isn’t a system-wide full-screen button iniPadOS.
