Jamilu Collins (SC Padeborn) and Odion Ighalo (Al Shabab) are still being expected in the Super Eagles camp in Garoua, Cameroon.
Tyronne Ebuehi is the latest squad member to arrive, taking the total number of available players for the 2021 Africa Cup of Nations to 26.
Ebuehi arrived three days before their opening group game against Egypt.
The Venezia defender has 10 caps for Nigeria, after making his debut in 2017 against Togo.
Although the Nigeria Football Federation (NFF) had said Ighalo would not be available for the continental competition, the 32-year-old refused to train with his Saudi Arabian team, hoping that they would reconsider their stand.
In camp now are Goalkeepers: Francis Uzoho (AC Omonia, Cyprus); John Noble (Enyimba FC); Daniel Akpeyi (Kaizer Chiefs, South Africa); Maduka Okoye (Sparta Rotterdam, The Netherlands)
Defenders: Chidozie Awaziem (Alanyaspor FC, Turkey); Kenneth Omeruo (CD Leganes, Spain); Oluwasemilogo Ajayi (West Bromwich Albion, England); William Ekong (Watford FC, England); Olaoluwa Aina (Torino FC, Italy); Zaidu Sanusi (FC Porto, Portugal); Olisa Ndah (Orlando Pirates, South Africa); Tyrone Ebuehi (Venezia FC, Italy)
Midfielders: Frank Onyeka (Brentford FC, England); Wilfred Ndidi (Leicester City, England); Chidera Ejuke (CSKA Moscow, Russia); Kelechi Nwakali (SD Huesca, Spain); Joseph Ayodele-Aribo (Glasgow Rangers, Scotland)
Forwards: Ahmed Musa (Fatih Karagumruk, Turkey); Henry Onyekuru (Olympiacos FC, Greece); Kelechi Iheanacho (Leicester City, England); Moses Simon (FC Nantes, France); Sadiq Umar (UD Almeria, Spain); Taiwo Awoniyi (Union Berlin, Germany); Alex Iwobi (Everton FC, England); Peter Olayinka (SK Slavia Praha, Czech Republic); Samuel Chukwueze (Villarreal FC, Spain)
Jamilu Collins (SC Padeborn 07, Germany); Odion Jude Ighalo (Al-Shabab Riyadh, Saudi Arabia)