>France/Germany/Austria
Their monarchy used to be legit until Carolingian empire broke appart in 3 kingdoms without imperial approval in itself since it is not clear to whom the legitimation given by Emperors belonged to.

>England
Their monarchy's legitimazy came from Papal approval using Constantine's donation as support of papal power, a document proved false. They never got a legitime approval from a Roman emperor and the by default non legit approval of pope became non existing after Henry VIII chimpout. Plus their monarchs are fake and can't thrace back to original monarchs of England.

>Portugal
Same case than England but without unlegit monarchy and protestantism, also add execution of non legit monarchy only approved by the papacy.

>Italy
Similar case than Portugal

>Roman Balkans and Africa
Let skip this part tbf, it's too obvious

>Spain
Visigoths arrived as Foederati backed by Western Roman Emperor and were given the Regnum of Spain in the abscense of direct Roman precense. This approval of Spanish monarchy made its way into our days, from Alaric to Pelagius to Charles V to Philip VI today.

>Ireland
it was never part of Roman empire so they don't need Imperial approval