The reason why Victor Boniface was nowhere to be found this season is because Bayer Leverkusen didn't perform well this season, and Victor Boniface didn't score so many goals the way he scored for Bayer Leverkusen last season, so that prevented Victor Boniface from being noticed this season. If Victor Boniface can be consistent next season and score so many goals for Bayer Leverkusen, he will regain his relevance in the world of football.
The Nigerian striker also had issues with his fitness. He suffered from some injuries this season and I guess it affected his performance. Bayer Leverkusen might not have had a smooth season like last season but they didn't also performed badly. They finished second in the Budensliga and qualified for the UCL.
Players like Patrik Schick who was in top form scored twenty one goals while Victor managed to slot in just eight. To show that injury affected Boniface, the club's highest goal scorer Patrik Schick played thirty one games while Victor featured in just nineteen games. I think Victor would have scored more goals if he was fit all through the season.