No, once you have reviewed and approved the rebalancing transactions, it will not be possible to make changes to the switch, redemption, or reinvestment transactions. 

All of these transactions & dates are automatically prescheduled over a set duration of time that considers ideal transaction timelines, non-working days, etc and it’s not possible to make changes to it later. When you approve portfolio rebalancing, you’re approving all the transactions and the timelines.

You can read more about why it takes some time for rebalancing, here.

We also have YouTube videos available for all the common FAQs on SIP and Portfolio Rebalancing. This will hopefully make it simple to understand the entire process and help clarify any doubts that you may have.