Given that you're worried about EMFs, the amount of power from nearby WiFi routers and cell towers is orders of magnitude more than from these satellites.

Starlink etc. use directed spotlight-like beams, so if you're not near a receiver (on the road) then no signal will be present. Why would they waste energy directing the signal anywhere other than where their dishes are?

(I personally don't believe in the harms of low power non-ionising radiation sources, but this comment is written in the context of avoiding them.)