My question is: does the MAGNET car holder affect the battery performance of the phone (iPhone 11) and the phone in general?
Is it safe to use the MAGNETIC car holder for iPhone 11?
Magnetic accessories might interfere with iPhone cameras - Apple Support
See info above...
It can also affect the Compass and other Sensors...
Apple recommends that third-party manufacturers avoid using magnets and metal components in cases and other accessories.
Your device has a glass back so magnets will not work.
does the MAGNET car holder affect the battery performance of the phone (iPhone 11)
