Yes — kalpopanna devas do interact, but only in a limited, celestial way according to Jain cosmology.

They may:

• appear to human beings,
• assist in special occasions,
• worship or honor Tirthankars,
• protect or influence events by their powers.

But they are not liberated souls. They are still within samsara, so their interaction is not permanent or spiritual liberation itself.

In short: Yes, they interact, but as heavenly beings with limited worldly contact.