As i said in my comment and it says on the page you just sent:

Important

%conda commands are deprecated, and are supported only for Databricks Runtime 7.3 LTS ML. Databricks recommends using %pip for managing notebook-scoped libraries. If you require Python libraries that can only be installed using conda, you can use conda-based docker containers to pre-install the libraries you need.

This is not at all a feasible way to use conda.