My little RIR's have had really noticeable little combs for awhile now...but my EE's almost looks like it's missing, it's really flat and almost smooth. Is this "normal" for these type of chickens?
Yes...this is normal. Easter Eggers an have PEA combs. Not all chickens have the same type of comb. Check out this article : https://www.backyardchickens.com/ar...ken-combs-single-pea-rose-v-shaped-etc.47958/
Completely normal, and as it gets older and closer to point of lay the comb will redden and puff up a bit.
Here is a good article on Comb Types, with pictures. https://www.backyardchickens.com/articles/the-9-comb-types.63029/