I really tried to make it in, but even with the extension I just had too much on my plate to finish in time :\ 2020 continues to be 2020 I guess!

I did get a decent way into my project, so hopefully I can at least post and share when it is done!

I was the same way. I got off to a great start in September, but didn't get my project done until just now, a few days after the deadline. Fortunately, that's the nature of game jams - it's more about trying and participating. Consider finishing your resource anyway - even if it's something that other people already have released. The more TTRPG resources out there, the better.