Chosen Solution

are those pads or whatever they are important? i just noticed mine has bottom one removed and top 2 are not conected, it says zero_f_wifi2_c type, i couldn’t find anything about it, wifi is still working but i think it has some range problems tho

also, if they’re important, would soldering/attaching foil or something fix it?

In most cases circuitry does have a function ;-} It maybe what it does may not be important to you. Your Galaxy 6 is a bit different than the one IFIXIT did for their teardown: Samsung Galaxy S6 Teardown

I’m suspecting they are antenna’s so the range limit issue would make sense.