Would it be possible to add dust objects for SimpleOres2 in the next update for 1.16.x?
Would make integrating SO into other mods easier.

Once I finish porting the various add-on mods at 1.15.2 or 1.16.1 to 1.16.3, I'll poke at dusts. I'm almost done with the 1.16.3 ports, so that will be soon.

I've been aiming primarily at Silent's Mechanisms, which already provides copper and tin dusts. I have only implemented mythril dust and adamantium dust so far. Does Simple Ores need to provide its own copper and tin dust?

For compatibility with other tech mods, it probably wouldn't hurt. That said, I've been using SimpleOres2 + JAOPCA under 1.15.2/1.16.1 and the only issue has been with mythril and adamantium not having any dust elements in any of the addons, and so crushing nuggets for these - just destroys the nuggets and leaves air.

Okay, there are now dust and crushed ore objects for all SimpleOres2 ores & metals except onyx. My theory for onyx is that it is too brittle for crushing and shatters into useless gravel if fed to a crusher/grinder.