I'm seeing a lot of these and they all follow the same pattern.
1. Do a site search to see if Google has it indexed (site:domain.com). Odds are, you'll find the site is properly indexed and GSC will show the same.
2. Do a branded search for Dental Practice+City. I'd wager the website does not appear. Fresh domains and rebrands seem to have more recent difficulty in getting Google to "connect the dots".
So, odds are strong it's not a technical issue and one that's more of an SEO issue and Google taking their good old time. Many of the sites I've checked have not had great on-site SEO, so make sure that is all good. If there is a blog, write about the rebrand and get that indexed — same with offsite posts.
Make sure key citations and socials are reflecting the new domain. Let that all marinate and then submit domain changes via the profile or public edits. If that still doesn't work, take it to Support and then the Community.