Minecraft v1.19.2
Slabs & Stairs v1.3.0

Deepslate, Concrete, Terracotta, etc slabs break as if using a bare hand. A pickaxe of every type has been tested with the same effect.

Thanks for catching that, I'm not sure how we missed it. It should be fixed in version 1.5.1

Will 1.5.1 work on 1.19.2?

This is a create/byg server so I'm locked in at that MC version.

I'm not sure, but feel free to test it and let us know. If it doesn't work, we will try to backport to that version.

Not working as downloaded.

Unmet dependency listing:

Mod 'Frostbyte's Slabs & Stairs' (slabsandstairs) 1.5.1 requires any version
between 1.19.4 (inclusive) and 1.20- (exclusive) of 'Minecraft' (minecraft), but 
only the wrong version is present: 1.19.2!

Slabs & Stairs 1.5.1 has been backported to Minecraft 1.19.2 as Slabs & Stairs 1.3.1

Thank you so much!