I'm trying to create a more global academic lens that searches across *.edu[.*] and *.ac[.*] domains. Yes, I know there's one built-in - but from what I understand, it only searches *.edu domains - which limits it to USA institutions. If I add ac.* to the list of included sites, nothing is returned. If I do a normal web search with a site:ac.* search operator, I get results from educational organisations around the world.
A search with a site: operator and a lens with the same include/exclude site with a wildcard should work similarly. Wildcards should work as a prefix and a suffix to a (partial) domain name.