It's not just that France isn't installing them. It's that laws prevent installing them, and laws keep offices and schools warm on purpose.

The prevention comes to play with massive restrictions around visibility of the units on facades in order to preserve character of apartment buildings and beauty. In some cases these can apply to private homes, too. Additionally you have the copropriété, where you need the majority of the building to grant you the right to install AC. The cities have rigid enforcement of all these and can mandate clawbacks and of course fines. And we didn't get into what you're even allowed to install - the things installed in the US won't cut it.

Offices and schools. Laws don't mandate AC, but they prevent it from being put too strong. 27C, I believe is as cold as you're going to get.

French people have a sort of cultural revulsion to AC - forget climate change and American influence, it'll make you sick and you'll hurting your health.

Just stating the facts, not defending the US. The US has a religious opposition to climate change actions as strong as the French religious opposition to AC.

And for older people, France sucks. For younger people, arguably the whole situation really sucks.