Can we add my Spouse after receiving ITA but before PR application

[Rohit Panduga]

Does adding my spouse during PR application effects the ITA or how long does it take for IRCC to process both Mine and my spouse PR application

 

[AishB]

Does adding my spouse during PR application effects the ITA or how long does it take for IRCC to process both Mine and my spouse PR application

Yes.
There are quite a lot of threads here on how to add spouse post marriage.