The root ("apex") can't have a CNAME, that's a DNS rule, not your registrar being difficult.
Two options:
- Link the bare domain in Replit as a second custom domain. It gives you an A record + TXT for
@. Add those. - Or use your registrar's URL forwarding:
mytailorshop.ng→https://www.mytailorshop.ng(301). Simple, one canonical URL.
I'd do 2, most registrars support it and you avoid duplicate content.