I am so disappointed with this, the propagation process is absolutely trash, my website and email settings for google workspace were not propagating to some places in the world, it was like that for over 3 weeks.
I made a business lose a lot of time over this and this business was not able to properly receive emails, which made them lose appointments.
I had to change to Cloudflare. And guess what, 12 hours into cloudflare, everything is on the whole world. Email setup and domain setup.
DO NOT USE squarespace, you will be much better if you rely on Cloudflare services, my experience has been horrible and could have affected my reputation as a service provider in this area.