It's the second most popular pairing for TFA. Poe/Finn is at about 1600 fics on AO3, and Kylo/Hux is almost at 900. I'd say that makes it pretty popular, especially since Kylo/Rey is almost 700 and Finn/Rey is at 300, half of which can be ignored because they're not actually Finn/Rey fics but Poe/Finn/Rey.
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It's the second most popular pairing for TFA. Poe/Finn is at about 1600 fics on AO3, and Kylo/Hux is almost at 900. I'd say that makes it pretty popular, especially since Kylo/Rey is almost 700 and Finn/Rey is at 300, half of which can be ignored because they're not actually Finn/Rey fics but Poe/Finn/Rey.