The Web Conference is slated to be a part of ACM’s SIGWEB from 2022 . The papers in WWW also cover topics that are not directly related to the web, e.g. recommendations, machine learning, etc.
The Web Conference 2021
WWW'19 had 297 full & short papers (18.47% acceptance rate) , and Scimago calculated a h-index of 22 . Assuming a similar trend, out of the 355 papers in WWW ‘21, I expect 26+ papers with 22+ citations.