ah the Matsuri gay chapter where it is made as clear as possibly can be that Matsuri is 100% gay and in love with miss sunflower.
And I know many of you will be like "yeah no shit" but also it's always good when a story doesn't tip toe around the issue and tells us straight up "yeah this one is actually gay".
Nah, they gave it the "I'm not sure it's the same feeling they're talking about" out, allowing it to maintain its 'might pretend it was never gay at all in the ending or an epilogue' positioning.
no, that is not the story going "don't worry no homo" that is the story going "Matsuri has fallen in love for the first time in her life and doesn't quite know if this is indeed the feeling of romantic love that everyone talks about because she's never felt it before"
Well, there are the two opposing positions, set out fair and square.
It's clear that Matsuri has, at minimum, Single-Target Sexuality. Whatever "love" means for Matsuri, she feels that toward Miss Sunflower.
Using the standard of "the (massive) preponderance of the evidence," I think it is beyond unlikely that this series will ultimately position Matsuri's feelings as being just a passing phase, a mistaken crush, something she grows out of, etc. Though the story has depicted Matsuri as naive, over-enthusiastic, and sometimes a figure of fun, it has never trivialized her feelings toward Miss Sunflower.
The main question has always been, "What exactly are Miss Sunflower's feelings toward Matsuri?" The corollary to that is, "What is Miss Sunflower's sexuality?" Both of those remain somewhat open questions, but increasingly the only evidence we have is that Miss Sunflower definitely loves Matsuri (the precise nature of that love being the open part of the question), and in regard to the second question, we have been shown that the depth of feeling she has for Matsuri previously has been matched only by her feelings for the first Miss Sunflower, a person she increasingly associates with Matsuri.
(Of course, there's also Miss Sunflower's status as a cosmic-level girl-crush magnet, i.e., the female population is picking up some kind of signals, whether Miss Sunflower knows it or not. [She does not know it.])