As it says in the accompanying text, it is a map of Fibre to the Home (FTTH) (and I assume Fibre to the Building (FTTB)). It does not include Fibre to the Curb (FTTC) where the fibre cable terminates in a street cabinet and continues to the home with the standard copper telephone wire.
They put FTTC into the village here a couple of years ago as a prelude to FTTH expected in 2022/3. There was little actual communication on the implementation. It seems some in the village have not upgraded their internet connection to take advantage of the additional speed available by switching from ADSL to VDSL.
I am about 750m from the cabinet. My speed went from the 2Mb/s I’d had since 2004 to 18Mb/s when I asked my original operator to upgrade. But even that must have been capped as when I checked other operators I found by switching I could get 39Mb/s for about 20€/month.
This is a map of every individual address internet connection in France. Possibly worth checking with addresses around you.
There is also the page to check the best offers for your address