Are eIDAS identity services even interoperable for private service providers? AFAIK public service providers use national portals that aggregate identity provid

Are eIDAS identity services even interoperable for private service providers? AFAIK public service providers use national portals that aggregate identity providers, but private service providers must have a contract with identity providers. > But since nobody became a billionaire out of it, nobody talks about it Here in CZ, the law was setup in a way that gives advantage to banks compared to other identity providers, these banks created one consortium, which is essentially monopolistic provider, with ~80 % market share, asking private services providers significant money for identity services.