I have seen some cool “puzzle” toys online. You hide treats in them, and the bunny has to pick up the pieces, and find where the treat is hidden. Maybe your bunny would like picking up and tossing the pieces around to hunt for the treat.
I got my bunny as an early Christmas gift, and I think teaching her tricks helped us bond a lot. For a long time, she wouldn’t sit in my lap for more than a few seconds, and she hated being picked up. I started by teaching her to stand up for a treat, and then taught her “lap.” She got a treat if she jumped in my lap. Then I taught her, “nose.” When I say, “nose,” and point to my nose, she will bump her nose to mine. After doing these tricks with her for a while, she would get so excited when I came and sat down on the floor, she would start doing all the tricks without waiting for the treats. Now she gives kisses, and will sit or lay in my lap, and on my chest when I lay down, and she isn’t afraid of being picked up anymore.
Someone suggested to me to hold up some playing cards and let the bunny take them from you and toss them. My buns didn’t like it, but she almost never tosses anything, so maybe your bun will enjoy it.