Hi,
I am having the same issue. The changes have been saved and appear on squarespace, when i try and google my website and navigate on it, non of the changes in titles, description etc. have been applied.
I also changed the SEO appearance (specifically "TITLE" but it does not reflect on the google search.
After making changes, do I have to request index in google search console and wait 72 hours for the changes to show?