I didn't hear or read it anywhere. It was based on observation. The handler is added to the .htaccess files but it is remarked out by default. In the case of one account, I had to "unremark" it to make the site run PHP 7.2, or so it appeared.The .htaccess includes the handler automatically in an AddHandler directive where did you hear this?
I admit that I'm doing a lot of fumbling here. Server administration is not a core skill of mine, although I'm getting better at it with the help of this forum.
I'll read over the link you supplied. Thanks for your help on this issue.