Did you mainly rely on the map or on the legislative text?
Legislative text. If the map, then I'd put stuff like the N333 in (though it might have become N4, finally, just before they prat about with it)
Some (eg the N7 alongside the A89, or the autoroutes that are just ramps within an interchange) are already not part of fraa or fran.
The SARA forum has something resembling dates on it.
via Google's tools, a translation:
4 January 2023 - Ministerial decision determining the list of motorways, roads and portions of tracks that are transferred or made available
Departments / Metropoles
Early May 2023 - Publication of prefectural decrees noting the transfer of roads and highways
During 2023 - Identification of the parts of services to be transferred in order to establish the service projects
January 2024 - Transfer of competence to departments and metropolises
Early 2024 - Transmission of agreements for the individual provision of agents
During 2024 - Publication of the Conseil d'Etat decree determining the transfer of services and beginning of the exercise of the right of option
Regions
Early September 2023 - Signing of availability agreements
1 January 2024 - Effective date of availability on the date provided for in the agreement