I just discovered:

This NEW Excel AI Function Will SAVE You HOURS of Work

and after much fun (not) installing everything that needs to be installed I can now chat with ChatGpt directly from Excel.

My first little chat was:

LABS.GENERATIVEAI oldest stone bridge in Australia

which returned the answer:

The oldest stone bridge in Australia is the Lennox Bridge, located in Glenbrook, New South Wales. It was completed in 1833 and is still in use today.

… oh.

I suspect it will not save me HOURS of work, still might be useful sometimes.