The family of Orleans are regicides, Philippe Egalité having voted for the execution of his cousin Louis XVI.
The unique Orleans king, Louis-Philippe, was an anglophile freemason and founder of the Grand Orient lodge.
No catholic seriously wants an Orleans on the throne. The defenders of the Orleans claim to the throne, use the 1717 Treaty of Utrecht as a pretext when Charles V (Hapsburg) renounced all Spanish claim on the throne of France
However Louis XX (great grandson of Franco incidently) fulfils the requirements of salic law to be the legitimate monarch. France is the only nation that imposed salic law which insists that the throne is passed on uniquely to male heirs. (thereby following divine natural law, and God always provided an heir, Louis XIV famously born on a 15th of August)
There are reasons why the Carlists never support any of the mainline Spanish Bourbons after 1936 that apparently got lost by today’s Legitimists, but which they knew in the past. There are other possible candidates that the Legitimists could support such as the head of the Bourbon-Two Sicilies.