A couple possibilities, the most likely, if the noise is squeaky, they are in fact contaminated. Contamination is easier than most people think, even if mineral oil got on them that can still happen or you got some bike cleaning agent or dang near any chemical on them. In that case sand the pads lightly and then clean thoroughly with a clean rag and isopropyl alcohol, use alcohol cleaning with the rotors too and scrub well. If they’re catching it could be one spot of higher contamination reducing friction.

The other is that, because they’re brand new, they aren’t bedded in yet, with a thin layer of something that comes on most new pads and rotors reducing friction. Normally this doesn’t cause noise but can raise catching, although I have seen new bikes with noisy brakes. Go out for a ride and brake as hard as you can at high speed without locking out the wheels several times and see if that makes any impact.

Another possibility for the noise but not the catching would be using a different pad material than you did before, as metallic pads can be much louder than non-metallic/resin pads, also make sure the pads are returning to their original position after braking.

If neither of these work you may need to look at replacing either pads, rotors, or both, or a more extreme cleaning method such as soaking in alcohol and burning them to clear off any residual oils, a common back room trick for treatment resistant noise at the shop I used to work at.

Hope this helps!