I mean, in terms of single fandom roleplays? Sure, mine do take a while to find a partner for -- Black Clover and Rise of the Guardians --, but it's even harder for me to find someone willing to play out a CC x CC crossover rp. For instance, Rise of the Guardians x Frozen or Tangled, and when there are people who do want to do crossovers between the two verses, they usually offer up the kind of pairings I'm downright uncomfortable with.
I have so many ideas for both the crossovers and the single-verse roleplays (both AU's and in-universe ideas), but rarely get a chance to explore any of them. Takes months, if not years to find someone. And yeah, I do actually reach out to people, especially if there are pairings I can do for them, in hopes they can do mine in turn. Lately, I do have one semi-active Black Clover roleplay, but that's after 3-4 years of searching. (Well, ~1 year, if we're talking the last time I've had someone respond to a BC roleplay, but that one died despite all of the times I've tried to revive it and was already dying for about a year before that.)
The Rise of the Guardians crossover roleplays have never really taken off. 6+ years searching across over a dozen sites... and the two roleplays where CC x CC was possible died shortly after taking off.