Update - I turned the power to 100%. IOS 14 is fine

So listen up, I have this router which gives me 300mbs. It is a high power router, so yes it’s not the fastest connection but it basically gives me 300mbs when I’m standing at the mall. This thing probably gives me cancer since it gives you a warning if you ramp the transmit power above 75%. Since the ios 14 upgrade, I can’t get full bars when I walk more than 15ft away from this thing. What is going on? I use to get full bars while mowing the lawn or Surfing