I think Gemini is just broken.
Instead of forwarding model-generated links to https://www.google.com/url?q=[URL], which serves the purpose of malware check and user-facing warning about linking to an external site, Gemini forwards links to https://www.google.com/search?q=[URL], which does... a Google search for the URL, which isn't helpful at all.
Example: https://gemini.google.com/share/3c45f1acdc17
NotebookLM by comparison, does the right thing: https://notebooklm.google.com/notebook/7078d629-4b35-4894-bb...
It's kind of impressive how long this obviously-broken link experience has been sitting in the Gemini app used by millions.