Male "breast feeding" isn't (necessarily) a troon thing. I don't know if the science behind it is legit, but the argument is that breast feeding is good for the child, not just because of the milk, but because of the bonding and because it's more "natural" for the child.
That's why they make (and have made) breast feeding harnesses. It's supposed to be a bonding exercise for the father and child, and also a better way for dad to handle feedings when mom isn't available for actual breastfeedings. You can find a bunch of them on Amazon, and I think they go out of their way to make them as nonsexual as possible.
This one is a goofy looking apron
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And women can use them too
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Might still be pseudoscience wooery, but at least it's still parents genuinely trying to do the best for their babies instead of using them for their own validation and sexual kinks.