Correct about the Hungarian Habsburgs.

As to King Carol's inheritance, I believe his widow Magda Lupescu inherited the main bulk.
She certainly inherited the Estoril house where the couple lived and where she died in 1977.
Don't know who were her heir/heirs.

The house was sold to a developper and became a luxury condominium.


https://www.mapcascais.com/pt-pt/detalhes-do-imovel/apartamento-exclusivo-no-condominio-rei-carol-historia-elegancia-e-conforto-no-coracao-do-estoril/23072579