In the latest round of NGI0 grants, 55 FOSS projects received funding. Quite a few of these are #Fediverse related. The @fediversereport has written up an overview of these projects and their goals. Have a look here: https://fediversereport.com/a-fediverse-look-at-nlnets-latest-grant-round/.
(Btw, a new call for proposals just opened. The next deadline is February 1th.)
https://nlnet.nl/news/2023/20231201-call.html