Some Research links:

Start reading here for other tips to improve your virtual meeting presence: https://blog.paessler.com/four-zoom-commandments

Also if you like gear, here is a nice setup if you have budget for a home studio. - https://dirkpaessler.blog/2020/11/09/four-zoom-kits/

Green screen on a budget - https://www.premiumbeat.com/blog/diy-green-screen-budget/

'ZOOM' wallpaper - https://www.chromawall.com/green-screen-for-streaming/zoom-green-screen

Green screen ideas - https://www.diyvideostudio.com/best-green-screen-for-video-conferencing/

Note - Why didn't I just tape/pin something on the wall behind me:

In the space I'm using, I share it with...stuff.  Specifically stuff that is tall enough to end up on camera and can't be moved.  So I needed something that could be not much further than my chair.