Yea, that was what I was thinking but I wasn't sure because of MOSFET current equation.

Yea, so for example, the MOSFET that I am using can handle 4A and my circuit draws max 1A. My question is, regardless of the VGS, will the current coming out of the MOSFET only depend on my load. Like it won't push extra current into my load?

Yes, I know that. My question is about limiting the current going out from the MOSFET that I use as protection in this circuit. Do I even need to?

Yea that works, I had a follow up question. Why 100k Resistor and not a different value?

USB is used as a secondary charger to the on board battery when it's connected.

@vir Oh okay great, was worried about that. So I can just leave whatever is connected on the same bus the same and just change the chip address.

Yea, but the SPI pins are already being used by other things so I am not able to do that.

Yea, I don't really need dimming I just want the LEDs to turn on or off, would you still recommend LED driver IC or is it not needed?

Yea that sounds like what I need thank you. I have a follow up question, since I already have something connected to my I2C line and I want it directly connected just in case the GPIO expander IC fails or something, is it okay to connect the expander IC on the same line as something else or do I have to connect the expander IC directly to the I2C line and then connected everything else through it?