Just to avoid confusion, you have added the domain to Cloudflare, you haven’t transferred the domain [registration]… https://cf.sjr.dev/tools/check?13f92a2254e942639457d31f97af8d78#whois
You will need to change the nameservers from the googledomains.com ones to the 2 allocated Cloudflare ones for your domain to become active on Cloudflare.
Tucows is stilll showing as the registrar. If they are being used by Squarespace then you’ll need to contact Squarespace. While the clientHold is in place, your domain won’t resolve and nothing you do on Cloudflare or your current DNS will fix that. You need to contact the registrar.