Why "remove" feature of the custom block isn't working?

Recently decided to take on ores for my massive project. I had some experience with custom blocks in 1.19.2 already, but it seems like they changed something in 1.20.x? The "remove" feature of blocks doesn't work at all. Main and place features are all good, with the odd one out there being "remove" for some reason. Maybe I'm missing something? The "remove" feature is in the pic