How do I get rid of the screen option buttons at the top of the iPad screen

You can't.

That 3 dot multitasking button is an integral part of the iPadOS 15 UI.

This cannot be removed.

Sorry.

You can always send unacknowledged feedback to Apple about your iPad/iPadOS issues here.

Tap this Apple Website link below.

Feedback - iPad - Apple

The three dots “button” is a core element of the iPadOS15 User Interface - intended to simplify use of full/split/slide-over multitasking. This control cannot be hidden or suppressed - and neither can multi-tasking be disabled in iPadOS15.

Apple do invite constructive feedback, comments and feature requests via their product feedback pages. For iPad and iPadOS:

Feedback - iPad - Apple

You are encouraged to make use of this facility in expressing any views concerning issues, bugs, or functionality changes of which you are unhappy.

iPadownerthatsUnhappy Said:

"I want the screen options at the top of my screen removed."

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Ridding of Screen Option Buttons:

Change the Background:

Perhaps this is part of the background? So, change it, to check.