https://www.reuters.com/markets/commodities/dutch-town-set-a... for the size of the FB facility.

https://en.wikipedia.org/wiki/Windpark_Noordoostpolder for the size of the wind farm.

Are you perhaps confusing hectares with the wattage as I read the following on Reuters:

The facility, which will use 1.38GWh of electricity and cover 166 hectares (410 acres) of farmland, is expected to run on green energy and provide the local economy a boost but has been criticised by some politicians and environmental campaigners.

1.38gwh is almost trice the optimal output of Flevoland and is indeed more in line with the total power consumption of Amsterdam. And will instead reflect several percentages of the national use.