That also implies that the mental burden of responsibility won't allow you to stop, and you probably catch yourself trying to fix problems at night in bed that technically aren't your responsibility.
But at some point you have to reflect: is it worth it? And I mean worth in the sense of health, culture, stress and not money.
And is your team better off with the current situation or is your skill not better used in guidance and evolving team members so that they can help you more? Why not do paired coding days so that skills and knowledge can be shared? Why not hackathon days to inspire creativity for automating annoying tasks?
If I've learned any wisdom in agile teams over the years it's that a Lead also has the responsibility to lead...and not overworking themselves to death.
Giving away responsibility is very hard. I understand the reluctance to do so. But you should plan your life for a better future, and not a better present.