Concerns:
About 3 weeks ago I started noticing the leaves turning yellow. I was not too concerned at first, but now some leaves are dropping and curling in. I’m concerned it’s dying.

Darryl
Thanks for the photos and your care details.
While I always say that yellowing leaves will eventually happen since every leaf has a limited lifespan, I can see your pot is much too small for a Monstera deliciosa of this size.
People are always told not to go too big but how can you know if it’s big enough?
Here’s my rule of thumb for a Monstera deliciosa:
When sizing up the pot, go as big as the largest leaf.
Example below: when it was time to repot my Monstera Thai Constellation, I chose a pot that was roughly as big as its biggest leaf.

A bigger pot should also alleviate some of the drooping.
As your plant continues to grow, you should be using fertilizer on a regular basis – more info here.
If you want to develop strong fundamentals in plant care, my book and online course will guide you in the right direction.