Just checked, the feedback form is also available on Desktop searches, also at the very bottom-right corner. It seems to open the same dialogue. Just gave them a small text, that the Fediverse (Mastodon, PeerTube or even Lemmy/PieFed) would open up communication to a lot of enthusiastic people, where there is a large overlap of interest in data souvereignity and ecological activism - the two main selling points of Ecosia.