For customers who purchased a domain in the Google Workspace sign up flow
Once regulatory approvals are obtained and the transaction closes, you will become a customer of Squarespace. After close, there will be a transition period during which customer information associated with your domain will be migrated over time, subject to limited exceptions, after which your domain management will be managed in a Squarespace account. This includes DNS and WHOIS settings and domain name renewal. We will work with Squarespace to make the transition as seamless as possible for you. Billing for your domain will continue to be managed by Google Workspace directly, even after your domain is transitioned to Squarespace.
Sounds like those are migrating as well.
https://support.google.com/domains/answer/13689670