Need multiple regenerate to add in the model

Creo Parametric regeneration will automatically make two loops through a model (if required) during the regeneration process.  If additional regenerations are still needed, they will have to be manually initiated.  I'd suggest taking a look at how your model is constructed, where relations are stored, and how components are structured, and then redesign things so that a single regeneration from the top to the bottom of the model tree will catch everything in the correct order.