What is this floating button on my Pixel and how do I get rid of it.

Hello @jvicswain thanks for the feedback! In Android 11, accessibility shortcuts were presented as a small figure in the bottom right corner. In Android 12, most now appear as floating icons. In my experience accessibility shortcuts don't have a long press context or trash option like you might see for other app icons. Accessibility shortcuts can be managed through accessibility settings.

That being said, I can definitely see how it would be useful to have more readily available access to these settings. I have passed along your feedback to the development team. Thanks again!