Do we have to buy a domain from a third party provider or is it included with the paid plans?

do we have to buy a domain from a third party provider?
1- Yes
2- No
3- You can but don’t have to

or is it included with the paid plans?
1- Yes
2- No

Bubble is not a domain registrar… so yes, you have to register a domain with a third party domain provider to use a custom domain.