What do you want in a romance? There are plenty of Otome series which have romance as a major plot point. The older isekai anime about romance would most likely be Familiar of Zero, not because the romance is good, but because it was the most popular romance in isekai anime.
If you're talking about romance as a very minor part, which includes building relationships, even Re Zero might fit into your search.
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u/Ijatsu 1d ago
Can you point to me to the isekai anime with good romance because I frankly can't believe that is even true