You are missing some low hanging fruit in this legacy project you’ve been assigned. Don’t just do the boring tickets you are asked to do. Of course that’s snor city. Instead do them but then also work on little tools to make the whole system easier to understand. Stop waiting for your boss to give you interesting tickets, invent them!
Good suggestion! I'm just a little skeptical as the job is remote and paid hourly. I submit my hours at the end of each week. I don't want to submit my timesheet and then be like "Oh hey yeah by the way these X hours are for something completely unrelated to what I was assigned. Hope that's okay." If it were salary based or something else I'd be totally willing to dive in but as is I don't want to ask to be paid for…
If you ask your boss for feedback on what's possible to submit on a timesheet, I'm pretty sure you're guaranteed a response.