Hello,

state field on lead generation form shows the records from the contact app -> configuration ->Fed. States (res.country.state).

It seems that odoo doesn't include the states of all countries default, so you can either create it manually or import the records for the country France and you will be able to find the state list on the lead generation form view.

here is the video that may help: https://youtu.be/5Izdf97FReo

Thanks.