Mr. Beast, for instance, had realized that so much of the world cannot access his content due to a language barrier, so he has started foreign language channels with dubbed version of his videos, which, unsurprisingly, also get millions and millions of views.
If your product is as robust as it seems like it is, with no effort, you could open the world to every content creator out there. That seems like a significant value add. Sure, you'll have to work out pricing and pin down product specific, but if there's one class of individuals I'd be aggressively trying to sell this to, it'd be folks like that. Heck, even the people with those no-face, listicle or voice-only content channels might be a great fit. Simple, easy videos that should ideally work well with your platform... and you can instantly help grow their audience!
Also, I have a relative who has grown a SASS from nothing to hundreds of millions in ARR. I can assure you that you all are no less competent than him from a business perspective. At many points in his trajectory his story would exactly mirror yours (complete, full, polished product, crickets of paying users), until they found the right market for whom their solution was a game-changer. So, believe in yourselves, too, and dont think that it hasn't happened simply because you don't have the skill: it just may be you haven't quite pounded the pavement for long enough yet. Good luck!