Hiya, Bobbie! Check out this WikiTree Help page: Help:YourDNAportal.
YourDNAportal.com is a website independent of WikiTree or any of the testing companies. They accept uploads of raw data from all the major testing companies--and some of the more obscure ones--for analysis, but they do no testing themselves.
Their DNA Relatives feature, which is the cousin-matching part of their service, is still in beta test mode after four years. There have been no news updates about this portion of their service since January 2020, so I have no idea how many sets of test results may be participating. I've been unsuccessful finding a reliable statement about the size of their matching database.
If anyone from our WikiTree DNA Project knows the answer to that, it would be very useful in helping folks determine if participating at YourDNAportal would be worthwhile.
