This is the actual paper: https://arxiv.org/abs/2501.02305

Did anyone see the code? I didn't find anything on gitlab nor github.

Edit: Elastic Hashing found https://github.com/MWARDUNI/ElasticHashing

Want to find out if it's only academic or also realistic, and esp. within which bounds.

Krapivin's work was a result of his study of the Tiny Pointers paper; his paper has already been linked in another response.