Will having a mirror on the TV wall frame affect Feng Shui?

It's absolutely possible, just don't put it within the sight of people sitting down to watch TV. Making a mirror can not only increase the light sense in the room, but also make the space feel larger, and can be installed with some more fashionable shapes or patterns. Generally, the bad thing about Feng Shui is that the mirror cannot be installed to reflect the toilet, kitchen, etc., and it cannot face the bed in the bedroom. Generally, it is fine.