There are no major updates happened with defi or at least not yet but you can keep watching the latest update from the dappradar
https://dappradar.com/defi or here
https://cointelegraph.com/tags/defiThere is some defi news that being published by cointelegraph but that news are not the big event for defi. The only major change if the pickle defi being asked to merger its platform with YFI