Notes on my Swiss Cheese Plant

I've had my Monstera deliciosa for nearly two years now, and I'm still waiting for it to produce those characteristic fenestrations on new growth. The leaves are healthy and large, but they're coming in solid. I know they need sufficient maturity and light, and mine sits in bright indirect conditions. Has anyone else experienced a delay in fenestration developing, or am I just being impatient? Wondering if I should be adjusting anything about its setup.