Dara is gorgeous. I can understand why spaying would not be advised. My Dash could not be neutered because of his ongoing digestive issues. Like Dara he is also less than 1kg, even at almost 3 years of age.
I hope Dara gives you as much pleasure and entertainment as my Dash. These little bunnies can pack a lot of loving into these tiny bodies.
Sending you and Dara some positive vibes.