For time being, I believe you may be permitted, but during your biometrics you may be notified regarding it for the and for the next session of JEE Mains or perhaps at the end during the Counselling Procedure you may be asked to change your Photograph. As this is the same photo which directly gets uploaded for your ID Card in Respective IIT, NIT, etc.

For more information about JEE Main do follow the link below

https://engineering.careers360.com/exams/jee-main