It is possible to change the domain name of your website if needed.
To do that, you have to update the APP_URL= variable in the /.env file after pointing the new domain name to your server (e.g. APP_URL=https://new-domain.tld).
Please make sure that your website is no longer accessible via the old domain name.
To migrate to a new server, please check out this article: How migrate to a new server?