Magnifier App downloaded by it self over night. How can I remove it?

Hello Stl-btw,

Thank you for using Apple Support Communities.

It appears that the Magnifier app was installed on your iPhone and you are having difficulties deleting the app. Deleting apps from iOS 14 is slightly different from earlier versions, take a look at the following support article to delete apps from your iPhone:

How to delete apps on your iPhone, iPad, and iPod touch - Apple Support

Best regards.

Magnifier is built in and cannot be deleted. It cannot have installed itself. It may have shifted itself from the App Library to a home screen somehow, which means you are now noticing it.