Unofficial port to Factorio 2.1 of OrichalcumCosmonaut’s Handcraft Timer: https://mods.factorio.com/mod/StatsGui-HandcraftTimer
Full disclosure: AI was used to port this to 2.1 and AI was used to create the thumbnail, all of it. However, testing was completed with over 100+ other mods enabled with no apparent conflicts. I will utilize AI to maintain this mod indefinitely, unless and until someone creates a better alternative.

No one was republishing this mod and I find it incredibly useful to the point that I think it should be baked into the vanilla game, so, here it is.