Mmm no. Actual science tells us the risk goes up with the frequency of radio waves. With terrestrial radio it's really low like 10%, but by the time you hit 5G it's up to 50% immune system being affected. See the studies I linked all over the place.
Masks can harm you with any kind of exertion like walking around or even driving. The harm is less than heavy exertion, but the longer you wear the mask, the worse it gets.