For people wanting some more information on NGI's involvement with #ActivityPub, this is a good starter: https://www.ngi.eu/blog/2022/11/24/how-ngi-supports-open-interoperable-decentralised-and-trust-based-internet-applications-through-fediverse-projects-like-mastodon/
Do you have an interesting ActivityPub-related project? The next deadline to submit proposals is December 1st - that is next week. And the best thing is: you can submit today!