'Not explicitly accepting' is very different from 'rejecting'. For example, the Church has not explicitly accepted the second law of thermodynamics (which is completely at odds with the church's claim that God will recreate the universe, thus decreasing entropy), but you'd be hardpressed to find an instance of the Vatican censuring that. The initial reactions to evolution by natural selection were rather neutral, and mainly focused on the ensoulment of species. The first official vatican encyclical (which is really the first kind of document that can be applied to the whole church on this topic) was Humani Generis, which took a neutral position on the topic. Not accepting every theory is not a sign of rejection. The church does not typically care to interfere in the minute details of every scientific endeavor. As natural selection became more popular and evidence mounted in its favor, the church responded favorably to it.

Can you cite an instance where the church as a whole rejected natural selection and censured the person writing about it? And I mean, an example not in the context of someone arguing that natural selection means there is no God, because that would go back to my original claim that the various censures were due to reasons unrelated to the purely scientific claim.

But that's assuming the church would want to suppress him for publishing his work. I don't see any evidence that that would be the case. You are assuming.