Pleroma users can't follow Peertube's channels

Peertube is a federated youtube-like where users can publish videos and other users can comment them and subscribe to channels thanks to ActivityPub.

In Mastodon, you can follow channels to receive toots anytime a new video is posted for example : @thinkerview@thinkerview.video

In Pleroma when you try to follow a Peertube channel, you send the follow request but you are in «pending request» and it's never accepted whereas in Mastodon you don't have any waiting time. I tried by manually adding the account through the search bar or by "remote following".

I tried from multiple Peertube's instances but still the same.