Is this a leak?

2010 Prius with 125k miles on it. I spent a couple daysv recently cleaning out the intake manifold, installing oil catch can, swap out spark plugs and pcv valve. Wrestled with the EGR assembly with no success. A week later i noticed some leaks around timing chain cover. So I gave that part a scrub and hose down to try to identify the source of the leak. Took these pictures yesterday... picture shows what's right below the exhaust manifold. There's a wet spot below the head. Is this concerning? Haven't noticed any drop in the coolant level. My plan is to have the engine checked out for leaks. Any other suggestions?