I think if you could add a command like /veinminer off to allow us to toggle it off and in it would be nice. I had been working on a house and been crouching and accidentally broke half of my house’s frame.

You can already do this with /veinminer toggle. If you're a server operator you can give players the permission veinminer.command.toggle. If you're a player, ask the server owner to give you this permission.

I had been meaning if you had the permission to use it you could turn it off or on when you wanted it.

Again, this is possible with /veinminer toggle which is exactly what you were asking for in the original issue.