Is there good data on founder comp at different levels of funding? Both salary and equity across roles, and how funding changes that. For example - I've heard

Is there good data on founder comp at different levels of funding? Both salary and equity across roles, and how funding changes that. For example - I've heard founders getting bonuses or being able to sell stock in later rounds to stay focused on longer terms, and that CEOs typically get the same salary but more equity than CTOs (YC is unusual in that it encourages equal splits).