Coolant leaking issue?

I've been experiencing a coolant leak from the front of the engine, can't find an exact leak spot, all hoses are just fine. under my thermostat where the water pump gasket is, I'm noticing a very slight bubbling of coolant, but the main puddle is on the passenger side of the car. Recently I had a flat, once the car was turned off, I heard loud bubbling, opened coolant reservoir and my coolant level is draining, have no idea where it went.

A buddy said it could be my freeze plugs, I'm seeing coolant on my belt tensioner (on that side of the engine bay in general so that's my only guess (assuming a freeze plug on the front of my engine).

It hasn't overheated I don't think (thinking because my gauge goes all the way to the red, but once it hits the red it goes down to normal and doesn't move, the fan is wired to a switch so I know the fan is kicking on no matter what).

It's been sitting for a couple days and I still see a new puddle on the passenger side of the car (under the front of engine)

This is all the info I can recall to help. I'm aware there are likely other problems (dealing with the wp gasket). My goal is to figure out why coolant is (visibly) just disappearing.

I'm not really sure where to start or how to approach this, I can provide pictures at a later date if needed.