Unintentionally started coasting, what next?

Ok, so I've been working at this WFH job for almost the last two years. I am a go-getter, and am usually very engaged with my work. When my manager got let go and I started reporting directly to the CEO, I helped work through some company problems, wrote some SOPs, and found ways to push routine work down in order to free me up for more business development and problem solving.

However, he is super busy--has way too many direct reports, and is very hands on in several departments, so he is stretched thin. Basically, he doesn't ask me to report anything to him, and 90% of my tasks are handed down someone making 40% less than me. I know what deadlines matter and which ones don't, and only have to put in minimal effort to make it happen.

So, the question is, what do I do next? The devil on my shoulder says to quiet quit, since they are not giving me the bonuses they dangled to attract me ($12K less per year than I expected!) and see how long this goes. Maybe start a side-hustle and see if anyone notices. The angel on my shoulder says to be hyper-engaged and see if I can add enough value to get a promotion if/when the CEO realizes he needs to delegate some of his direct reports. I hate coasting. I hate the feeling of coasting. It feels lazy and vulnerable. What would you do?