If your goals are not eligible for portfolio rebalancing yet, it can be because of any of the reasons mentioned below:
You don’t have any old or non-recommended mutual funds (you are invested in our recommended funds).
If you have old//non recommended funds, it may be that they are not free of exit load charges & STCG taxes yet.
The exit load free amount in your goals is below Rs. 10,000. (the minimum required is Rs. 10,000).
You don’t have an auto-debit (NACH/e-mandate) set up. You can read why it’s needed, here.
Your investments could be under a lock-in period (ELSS funds for example have a 3 year lock-in).