Sawmills could use some more recipes:

• Stripping logs and wood
• Recycling doors, trapdoors, signs, Quark chests, fences, pressure plates and buttons
• Crafting Quark posts from logs

Any mod can indeed support Environmental's sawmill, as it's just recipes in the data pack portion of the mod.

I have a question: can any mod support Environmental's recipes, or they need to require Abnormals Core as a dependency to support these recipes?

that's good to know. thanks!

Let me just say, it's almost ludicrous that Mojang didn't add this when including all the other stations (especially the stone cutter)...

Also, support for woods from more of the popular mods would be great (BoP, BYG and BetterEndForge come to mind).
I've been slowly working on those three myself along with Quark's stained planks in a separate repository just so we can make more use of the sawmill on my server: https://github.com/MarioSMB/datapacks/tree/main/sawmill_recipes