It appears that polanhost.com has added the “.com.ng” domain extension to its offerings. On their domain pricing page, they only list the following TLDs:
.com
.net
.org
.info
.com.ng (Nigerian second-level domain)
Additionally, this is consistent with the broader domain landscape: most Nigerian registrars and hosts (such as Polanhost, Polanhost.com, Polanhost Server) offer .ng and its second-level variants (like .com.ng, .org.ng, etc.).
polanhost.com: Offers .com, .net, .org, .info, and .com.ng etc
Other local registrars: Same story—only .ng and .X.ng domains are available
If you're aiming for a domain with a distinct Nigerian identity, your best choices remain .ng, .com.ng, .org .ng, or .name.ng. When .naija becomes officially available, it may come through a local registrar or ICANN-accredited provider.