We just had sod laid about a month ago, Bahia grass. It is so lumpy and bumpy I can’t imagine it will flatten out. It’s nice and green but walking on it is hard. Will it flatten out? And it also has dollar weed throughout.
It should not be lumpy and bumpy - if it is, it probably means whoever laid it did not prepare the soil beneath properly, which should have been levelled out and firmed down a little and any medium to large stones removed. Did it look flat and level when it was first laid? If it did, does it need cutting yet - if it does perhaps the bumpiness is simply because it needs cutting?
Otherwise, try lifting up a strip of sod (round the edge is often easier) which looks particularly bumpy/lumpy - if it hasn't yet rooted into the soil beneath, you should be able to see if there are bumps and hollows or lots of stones in the soil beneath, which would confirm whoever laid it has not done the job properly.