Hi there, welcome
How long have you had Peaches? Did the thumping behavior start recently? Or once they were bonded?
Thumping usually does indicate fear, but if they were bonded recently, she could still be grumpy at you for the whole bonding process. If that’s the case, she’ll forgive you in time.
I’m currently bonding my two, and Bun Jovi thumps at me all the time because he thinks i’m going to scoop him up for a bonding session (and he normally loves me and snuggles up for pets)!
It helps to offer treats, and laying on the floor as you have been should help too.
Bunnies also act fearfully when they hear something scary (that maybe you can’t), the smell something weird (maybe your co-worker or friend’s dog?), or they are in pain (an underlying illness or injury).
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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.