It doesn't block it because it's generally not active on all pages of a site. The description of v3 sounds more like Google Analytics and will probably be treated similarly.

I find a v3 block to be unlikely for the same reason v2 isn't in easylist - too much friction for the list users. Websites will likely break completely when performing actions if they don't receive any sort of verify token from the browser. It would probably be best to have a list for recaptcha v3 as a built-in optional filter so that users know they've enabled it and know why websites might be breaking.

On the other hand, the lists haven't removed ad / tracker blocking for sites that block ad block users. I still see "disable adblock to view this site" occasionally. I think leaving rules in place that result in blocked access to sites, but letting through Google tracking scripts on every page because it results in the same would be a huge misjudgment on the part of the list maintainers.