Is there an easier to to select all the TDLs other than one at a time? That's very time consuming.
There is not. But you’re not the first person to want this
Take a look here https://help.nextdns.io/t/q6htsqz/block-all-tld-by-default-allow-by-exception
Well they said they are going to add more TDL options over a year ago, and yet nothing has happened. I guess we're SOL?