I have three domains and I want to assign each domain to a separate website. 3 domain === 3 websites

I have three domains and my goal is to link each one to a separate website. This is a standard setup: one domain for each site. I purchased these domains to develop three different websites, but I encountered a surprising issue. Despite setting up different DNS configurations with Azure and using three distinct IP addresses, all of my domains redirect to the same website. This error seems to be on Squarespace's end, and it's quite frustrating. How can I resolve this?

Have you got three websites on Squarespace? and gone through the domain connection on each website individually for each different domain?

https://support.squarespace.com/hc/en-us/articles/205812378-Connecting-a-third-party-domain-to-your-Squarespace-site

I would probably recommend talking to Squarespace Support if you are still having issues:
https://support.squarespace.com/hc/en-us/requests/new#choose-topic