Presidents’s signature is not on the citizenship certificate so they delayed for nothing …the signature is the USCIS commissioner or whatever they call him. The president did sign a letter congratulating us on being new citizens (somewhat insincere considering his views, but anyway).
Also my kid didn’t get the pack, just a flag when she got her citizenship certificate but all the adults in our family who had to naturalize got the full pack. I wonder if they do it differently in different states, though that wouldn’t really make sense as USCIS is federal.