I think the converters and adapters for this 'n' that have become so common that there is a natural tendency to believe that you can transfer anything to anything else. While it may be technically possible to provide "RCA" video output MHL, is there enough demand to make it economically viable? I do not know, but I guess the answer is "no." And while "HDMI" identifies a protocol-specific data, all the "RCA" conveys is the colloquial name for a type of connector. Both composite video and component video usually utilize the "RCA" type connector, and both are very different from HDMI in multiple ways. I'm not criticizing you for asking at all, but only say that (in my opinion only) an adapter to do what you want, almost certainly does not exist.
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