Could this be why my car reeks

My car has been smelling of gas/ exhaust and it’s been seeping into the cabin while it’s running. Did a soap spray down and found a few leaks at the exhaust manifold.

On the side of the engine behind the exhaust manifold, was wet with what I presume is oil, could that oil be caused by this exhaust manifold leaking? Or would that be a separate engine leak from somewhere else.

The oil dipstick has a hint of gas smell in it too, could all this be because of the manifold leak?

Thanks any input is appreciated.

Also I’m guessing it’s best to get a brand new manifold, but could it be viable to seal it?