It feels like yuri fans have a much more narrow definition of yuri and romance compared to NL manga fans.
Some do, and they tend to be extremely vocal about it. Even series where the leads are incredibly lovey-dovey for dozens of chapters but without explicit statements about them “dating” or on-panel kissing/physical intimacy don’t make the grade for those folks.
But many, maybe most, other readers seem fine with Dynasty’s looser “at least one MC has romantic feelings for another girl/woman” approach. So it’s quite a generalization to label “yuri fans” as a whole that way.
The occasional statements by manga creators tend to complicate the issue further, because they often seem to have a culturally-specific, or even industry/genre-specific, definition of “yuri” in mind when they declare their work to be “not yuri.”
(Although it certainly may have happened, I can’t recall any example of a mangaka saying that their work is yuri when major parts of the reading audience disagree.)