Welcome to BB Cari.
It’s good that both your rabbits are fixed. This prevents pregnancy and lays down the foundation to properly bond two rabbits— but that’s the key. It lays down a foundation to begin the bonding process.
After the rabbits were fixed, did you keep them separate and go through pre-bonding, bonding sessions, supervised 24-hour sessions, etc.? By completing the bonding process with two fixed rabbits, it helps form a healthy bond, rather than one that may include bullying (which is dangerous for both the rabbits’ mental and physical health). If you did do this, perhaps it was a bit rushed, or maybe something has occurred which has damaged the bond and it needs to be re-done from square one.
At this point, I would recommend separating the two because they do not seem to have a healthy bond and starting the bonding process from the beginning. Other members who are experienced with bonding can chime in to lay out how that may work. To get some basics, read: https://binkybunny.com/BUNNYINFO/tabid/53/CategoryID/9/PID/940/Default.aspx
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.