Friendica - Federation problem

Good morning, I'm the administrator of the friendica poliverso.org instance. I am writing to you because, with the username informapirata, I opened a community/sublemmy (poliverso) and I started doing several tests to probe the readability and interaction from my friend instance and from my mastodon account @informapirata@mastodon.uno . Unfortunately I noticed that with friendica I can't send messages from poliverso.org, while I can send them easily from the twin instance (same server, same system engineer and same configuration) friends.polli.social. I wanted to ask you the courtesy to give me some suggestions or some ideas to help me solve this problem. A greeting, Macfranc