Oh, actually, I don't usually look at romance novel queries, but I did read recently that dual POV is normal for them. (But YA romance is different from adult romance as a genre, so I don't know about that)
I have queried an urban fantasy novel with two main characters, each with their own POV--in fact, they were actually a split personality--and the advice was the same: pick 1 POV. And that was me coming in, saying, "I know the rule, but for this unique case, does using 2 POVs work, and if not, tell me why?"
In theory, any "rule" can be broken if it's done well, and if it works with the book. I've queried with a rhetorical question (a well-known "no-no") and gotten great results, but for most of my novels that wouldn't work. There are reasons behind the rules, and knowing those reasons is important when you're writing queries, particularly your first one. But as PuttPutt's excellent thread points out, if you have a winning query, it doesn't matter if it broke the rules. The problem is that you never know what element might hook an agent. It might be a phrase or an element you mention in your query or the voice or your title. The best you can do towards knowing if a broken rule is likely to work is the natural reaction in QLH, but you'll probably also get a mention of the rule, even if people like how you broke it.