So, we know that the feedback array cannot be used twice in the same round even if the ship is equipped with two. Fair enough, as there is information that you are using it instead of attacking (hence the second has no chance to trigger, as there is no more attack opportunity that you could skip).

Hyperwave Comm Scanner is not using such a condition, hence could one use it twice in a round to boost another friendly ship with both Evade and Focus? It does not seems overpowered: you burn 2 squad points to get two tokens (per friendly ship) in round 1 only (you could potentially run with Dormitz and 2xHCS with 3 Omega Sq Tie /fo with Juke and Comme Relay to get an opening with focus/evade and TL potentially but that's still not that powerful), even with Comms Relay that 1 evade is not a big problem as most probably the ship could have taken it in the 1st round without big issues, anyway. The after another friendly ship is placed is not excluding another HCS from being triggered... so..

I think it should work OK. How do you think?

Could go either way - unlike Feedback Array there's a stronger argument for both of them working, as they're not doing their thing instead of something else, they're doing it in addition to something else.

Certainly multiples on multiple SHIPS would work, but whether two on the same ship would... I think yes, but I'm not sure.

So, to be clear, I mean two on one ship, both of them used to boost the same "another friendly ship".

It's just doing something, not replacing anything, so yes two on the same ship should work.