https://features.icann.org/dotless-domains
I would think yes, despite the nomenclature, and that there is technically supposed to be a dot after the tdl.
It's to clearly identify a domain as a FQDN and not as a subdomain of your search domain.
See https://news.ycombinator.com/item?id=24442033 for why it’s allowed on ccTLDs
https://features.icann.org/dotless-domains