Gardiner and I made the decision to replace judging with mentorship in 2019, with the primary reason being that judging tends to only benefit those who need it least.
Instead of having judges highlight games that are already visibly "better" than others after the fact, the community as a whole can draw more value from having experienced developers around to answer questions and offer advice that can be actioned (or ignored) before the jam ends. It also helps to make sure that the jam is framed as a challenge/learning opportunity rather than something specifically competitive.
This year (and in 2019), most requests for advice have been happening on Discord, so that's where our mentors are present. If it's of value, I just made another thread sharing some less project-specific tips from them.
I believe that Gardiner is planning to do a video of his favourite submissions this year. I'm also planning to stream submissions again this year as well. That said, it feels important to me to highlight that our opinions are just two among many and to signal boost other people's coverage with equal prominence, since a diverse a look at submissions is more valuable to the community as a whole.
Hope all that sheds some light!