Digambar Jain practices during Paryushan Parva can vary by community and individual guidance. There isn’t a universal ban on eating papaya in the night specifically for Digambar Jains.

• Papaya is a fruit and, in general, is considered acceptable within a normal Jain diet (which excludes root vegetables and certain other restricted items in many households).
• During Paryushan, many Jains observe stricter fasting or vrat rules. Some days involve eating only certain foods or none after sunset, or following a vrat that limits meals to certain times or types of food.
• Whether you can eat papaya at night depends on your personal vow, the advice of your guru/uttar (spiritual teacher), and the specific Paryushan rules you’re following that year.

If you’re unsure, it’s best to confirm with your local Digambar Jain monk or your family’s paterfamilias who set the rules for your community this year.