Hi, would be nice to see it but anyways you can make some herbal tea depending what you have at home and make a compress for a few minutes a few times a day, depending how bad it is, maybe two times would be enough.
Sage, yarrow, thyme are known as strong antiseptics, even if you have black or green tea it would work as disinfectant as well, I can't guarantee if you use tea bags as I only use loose teas, I don't know what they add to tea bags possibly so just don't know.
Also you can use saline (salt water) also very good for wounds and safe to use.
I wouldn't use oils and think there's no need in antibiotics at all.
Normally wounds heal really quickly without any cure, especially if your rabbits live in a clean environment, but if you will feel better you can rinse with herbal/black tea or saline or make a compress if you think there's abscess.
How to make saline solution
https://www.medicalnewstoday.com/articles/323842#instructions