This happens due to a settlement period after you’ve sold a stock. When you sell your stocks, it first gets added to Groww Balance as ‘Available to Invest. After that, it takes up to 1-2 working days for this amount to be moved to ‘Available to Withdraw’.
Within this timeline, your sell transaction basically gets cleared and settled by the exchange and clearing house.
Please be assured that your amount is completely safe and it will be ‘Available to Withdraw’ soon after the settlement period.