Not that I'm agreeing with the parent comment - having worked in the microwave comms industry (and a little bit of radar) for about 10 years, the best explanation I've heard for 'Havana Syndrome' is closer to food poisioning than anything to do with RF. I think the US Government has basically walked back any claims that they were actual attacks recently too.
What they don’t have is the power level to have much effect beyond a few feet.
Microwave is just a term for a largish swath of the spectrum that encompasses millimeter wave, and lots of cell phone bands, and frequencies used in point-to-point microwave links, frequencies used by your microwave oven, wifi, etc.
For FCC that might be the case. CE/RED in Europe goes even as low (or as high, depending on which way you want to see it) as four orders of magnitude.
Microwaves are not similar nor are cellular radios able to utilize microwave communications.
Microwave towers are specifically built at great height and are utilized for long distance communications.
One cannot turn a cellular device into a microwave, nor can one utilize microwaves to achieve cellular communications.