Bullshit! You need way more than 50W to create a field intensity of 1Tesla let alone 220! maybe micro Tesla! 1Tesla is 2.4 x10 to the power of 14W/ sq m! here it is written out in normie language 240000000000000W per square metre! or 240 Terra Watts per square metre. If you had any technical knowledge at all or even had the slightest desire to be educated, you would have done your own digging on this subject and found that you are completely wrong & you are reading your app incorrectly (maybe the app writers are peddling fear pron!). By the way, the reading you are getting is only from within the pass band of your phone! so it's only WiFi and cellular frequencies it can read. If your phone is not 5G & the operator is not transmitting 5G on the same bands your phone can read, then you will NOT be able to measure anything in the 5G spectrum for your area!
Educate yourself and stop spreading your ignorance!