Strictest answer: Yes, but only with other heavenly beings in the same devaloka.

In Jainism:

• Heaven is not the place of liberated souls (siddhas).
• Liberated souls do not stay in heaven; they reside at Siddhashila.
• So you cannot “meet” siddha souls in heaven.
• But a soul in heaven can interact with other deva beings in that heavenly realm.

So the strict answer is:

Yes for other celestial beings, no for liberated souls.