Srimate Ramanujaye Namaha!

Namskaaram swami, yes that aatma inside achit need to get pious credit and then will get a living body with jananam and then has to surrender then can go back to Vaikunta.

aatmas inside acit is dormant with their knowledge covered and waiting for an opportunity to get a body with prana vaayu attachment.

The following two threads explain this in detail.

https://www.kinchit.org/dharma-sandeha/thread/aatma-inside-acit/

https://www.kinchit.org/dharma-sandeha/thread/brahmam-jiva-and-jadam/

Adiyen