The block  that has set by the command block whil first have to break but the second block can be "half broken"

There is a command block with the command "{color:#4c9aff}setblock ~-2 ~ ~ minecraft:diamond_ore{color}"

And im breaking the diamond ore with a diamond pickaxe that has the enchantment efficiency 5

and i break the first diamond ore and the second i stop when its not completely broken

I tested it and it works with other blocks