Admittedly the game probably has to have a devlog of some form, otherwise this question is synonymous with "what games are you waiting for?", which is far too generic a question.
The game I'm most interested in is Songs of the Eons (itch.io, most active), which wants to be like Dwarf Fortress but a grand strategy game (main post, for context). Obviously they've noted that such a project will have Dwarf Fortress esque development, so waiting is very much in order.
There's also Hyperbolica (trailer) which I've posted about here somewhat.
There's also Hytale, Creeper World 4 and to an extent KSP 2, which I like but don't follow that regularly, for not much reason TBH.
I'd probably also follow Deltarune but Toby doesn't seem to really do dev updates too often.
So are there any games that you're following as they're developed?