If you're using the Create mod on version 1.20.1, you will not able to get copper buttons in survival mode; being the create mod uses copper nuggets and it removed the crafting for copper nugget via Golem Dandori.

I thought it would be amazing, to be able to use both of these mods together. (But you can't, I didn't know where I could talked about the issue; so I put it here.)

You can use crafttweaker to change the recipe for the copper button to fix this.

If you're using the Create mod on version 1.20.1, you will not able to get copper buttons in survival mode; being the create mod uses copper nuggets and it removed the crafting for copper nugget via Golem Dandori.