Blur

I have a Logiteck 4k webcam for my presentations on Zoom, I need to share my screen, and I want my interlocutors to see the TV screen behind me, except that on Zoom, everything behind me is blurry due to auto focus.

I specify that the “blur my background” option is deactivated and I also specify that on the Logitech software when I do the test, there is no blur like on Zoom.

How can I permanently remove this blur behind me please?