In a way, though it is probably different, the way they hide their relationship reminds me of another series about co-workers (yadda yadda, het bad, get it out of your system now) deciding to date in secret to avoid the stigma of a workplace romance, going to lengths that at time seem overdone and detrimental to their mental states. It has a similar situation where one would think that their surroundings would be fine with their relationship, but they continue with the charade because the author doesn't want to change a working formula.
that is just the thing about formula, though... if you use one too much, or for too long, it gets boring. I'm very frankly nearing the point where I'll drop this. It's been too long, and no amount of wholesome is gonna make me stay for more chapters, WE NEED PLOT ADVANCEMENT AND EVOLUTION OF CHARACTER. and there clearly isn't nearly enough of that here.
Of course you’re free to decide that you’re too bored to keep reading whenever you want. But there’s nothing inherent in the slow burn, SOL comedy genre that demands a particular kind of goal-oriented “plot advancement” or “evolution of character.”
This isn’t, for example, a story with a implied narrative endpoint, like ones that pose the question of whether the MCs will get together in the end—they’ve been together from the start, and their relationship has always moved quite slowly. It wasn’t so very long ago that the MCs finally worked themselves up to their first kiss, which was a very significant (relatively speaking) plot advancement and development of character.
So by all means, decide that it’s “too long”—by your standards—or that the wholesome isn’t enough, or that their failure to announce their lesbianism to the world has extended beyond your personal point of tolerance. But what you “need” from this series is by no means what everyone else needs or wants.