I just installed on the same server where I run a Mastodon instance a WriteFreely blog. Since it's using the ActivityPub protocol, I think quite interesting that it can be part of the Fediverse. :)
I tried to follow this blog (@firstname.lastname@example.org) from my Mastodon account (@email@example.com) for testing purposes. But there appears as if there is pending request and I cannot find how to approve it or to disable the need of a request to follow this blog.
Update: (07.01.2023) It seems that this problem only occurs because I am using this WriteFreely blog as a subdomain of my Mastodon domain.