I have tried the ways you mention and it has not worked for me to copy the .tom file to the defaultconfig folder

A bit more info? Do you mean on a server?

That's right, I'm on a server and I did what they recommended to copy the .toml file, could you make a video tutorial?

since I tried with the .toml file, also with the generator put the profile and the server does not generate structures

There is a bug currently. You need to manually edit that .toml file to replace the with the profile you want

Could you explain me in detail?

Edit that toml file using a text editor and replace the string with whatever profile you want (like 'default')

#General settings
[profiles]
selectedCustomJson = ""
selectedProfile = "rarecities"