I am no tech person, so that I have no idea what you are telling me; I’m sorry.
But I guess you are telling me that it is not your plug-in that prevents my site from being upgraded to higher version of PHP and the compatibility checker I used has some logic issues.
When I checked the compatibility of my site, the result shown on the image attached has been returned. And my site has not been responding to the higher version of the PHP just as the result shown.