It should be possible to ping him to a post or comment though. (or for him to comment or post here)
@v9CYKjLeia10dZpz88iU he should be able to post here, provided the instance is not blocking Threads. That's how you could possibly ping him. Otherwise, maybe raising an issue could help.
@i_am_not_a_robot Lemmy itself does not allow you to follow people, that's why you cannot see him (unless he posts/comments something on Lemmy).
Kbin is the closest thing to Lemmy that allows you to follow individual persons.
@hedge
It should be possible to ping him to a post or comment though. (or for him to comment or post here)
@v9CYKjLeia10dZpz88iU he should be able to post here, provided the instance is not blocking Threads. That's how you could possibly ping him. Otherwise, maybe raising an issue could help.