Problem:

• It's a bit annoying when you're in Survival mode and you're looking for a block to decorate and you need to figure out by trial and error which block Chisel accepts, especially in modpacks when there are several mod blocks
  There are also Vanilla Minecraft blocks that are not accepted, such as Bricks

Solution:

• An overlay indicator showing which blocks are accepted would be very practical, in this screenshot I put a red bar just to illustrate

If you find this useful I ask you to update to fabric 1.20.1, thanks