In terms of players getting picked there's always politics involved. Coaches have alway been told who must be picked by NFF. Ahmed Musa in particular.
Musa I know about. There was clamour at one point in time that the Nigerian National team featured only southerners and no Hausa/Fulani were represented. Like this isn’t about competition and picking the best 11.
Musa did his thing for us no doubt but he can’t keep getting featured when he plays in a less competitive league (Saudi Arabia IIRC) and we have plenty of young promising wingers playing in stronger leagues eg Chukwueze, Simon (fwiw), etc.