Deployment of configurations in dev environment after P2T

Hi Team,

We just wanted to understand the effect of P2T. We are using Dev1 environment as the source of all VB customizations. Herein, we deployed, tested and post confirmation we have migrated the same to production. Now, we are awaiting a P2T next week. In the meantime, we are still building on additional rules. We have the below queries:
1. Post clone how to deploy into the dev environment both the old (the ones already migrated to Production) and the new changes that exist in the project(the ones configured prior to P2T). Can we just run the out of the box (hcm_extension-Package_and_Deploy) pipeline created while we created the project, which we have been using since the start to publish changes in the dev environment?