Truly he is a big play at Bayern Leverkusen and in the Nigerian national team but he hasn't proven to be a reliable option in front of goal in the colours of the Nigerian national team, and if we are not being sentimental about this, we all can confirm that our super eagles team has greatly struggled when victor osimhen is not available, because victor Boniface is not that used to the physicality of African football, though with time and if he can stay injury free, just as you have rightfully said, he might recover his Bayern Leverkusen form in the colors of our super eagles, but till then, he just needs to work on his form and be in good shape, so that he can give his possible best, because it's not nice that a top player like him can't cover up very well when victor osimhen is absent, which is not good in my own opinion.
Do you mean Victor Boniface playing in Bayer Leverkusen have changed him completely that he now needs time to adapt with the playing pattern of Africa football.He doesn't need to change anything in his game, all he just have to do is to add physicality to his game, because we all have seen that since he started featuring for our super eagles, we just can point at any point in time when he was actually doing well in the colors of our super eagles, his best playing form is mostly at Bayern Leverkusen, while in our super eagles team he has greatly under perform, and by watching at him, it mostly boils down to how physical African football is, so if he can adjust his physicality, I believe that he is going to do well with time.
But even if you want to narrow it down to physicality, I think victor Boniface is okay because his game in the Bundesliga and even his physique shows that he is more than even capable in playing and relating to African football. But I also can't deny the fact his game although drop everytime he plays for the super eagles but if its physicality I think Boniface has the body to blend well in African football beside he was a home base player.