Hi Elisha, I’m by no means an expert, but I’ll have a go at answering your question.
Firstly, two female bunnies can absolutely be bonded, though the bonding may be a little bit more tricky and both definitely need to be spayed and healed first. I know many people who have two bonded females and I had a bonded quartet which contained two girls. It’s definitely possible.
However you did make a few booboos: first mistake was to introduce them before Kiwi got spayed. Second mistake was to let Sherbert near her when she’s probably still in pain or at least uncomfortable from her spay. Also: after a spay the hormones take about two months before completely leaving the bunny’s body.
So plan of action I would suggest for you, Sherbert and Kiwi, is to seperate them completely, so that they can’t see or hear or smell each other at all. I know if space is a problem, this may not always be possible, but it is ideal so that both can forget the yucky fight they had and stop associating each other with anger.
Wait until Kiwi is about 5 and a half months old, get her spayed and then wait another two months. Then you can start reintroducing them to each other and start the bonding process. I know what I’m suggesting is a long process, but in the end I’m confident you will have two happily bonded girl buns.