If you go into creative and search for bundle, it is not there. You also cannot craft the bundle. But, in Experimental Snapshot 7, you can. It is in the creative menu. You can craft it. Just not in snapshot 21w37a. The first two screenshots are in experimental snapshot 7 and the last two in 21w37a, as you can see by the debug screen.
MC-237216
Bundle no longer obtainable without using cheats
Resolved
Duplicate
0
Thank you for your report!
We're tracking this issue in MC-228732, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki