a proqueer individual is someone who is supportive and accepting of all harmless queer identities that are typically seen as cringe, weird, or "contradictory". this would include lesboys, turigirls, gaybians/sapphilleans, and mspec lesbians gays.
a similar and more commonly used term to describe this would be pro-good faith, which is someone who is supportive of all queer identities, including "contradictory" ones, as long as it's meant in good faith.
now, a RADQUEER individual is someone who advocates for the inclusion of harmful paraphilias (pedophilia, zoophilia, necrophilia, etc) as well as transids (transracial, transabled, transage) in the queer community, and generally consider many genuinely harmful things that are very much NOT queer, to be queer.
being proqueer/pro-good faith is not the same as being radqueer.