IANAL, but if you are trying to profit from this, you’d probably have to leave the company and make the pitch from outside.

And if they think you developed it while employed, things could get nasty. Don’t want them thinking you’re selling their IP commercially either. Formalizing the idea while employed and then taking it outside could be trouble. Probably worth discussing details with a lawyer before attempting.

If you develop an MVP while employed and gain stakeholder acceptance, you likely won’t see any huge financial gains. Maybe a promotion, pat on the back, small bonus, or can enjoy the prospect this being more interesting work for a time.