I'm writing my unity code into pseudocode but can't find any examples of void Start() of void Update() in pseodocode
It depends on what you mean by "pseudocode".
Most people just mean that it is generally simpler and more natural-English-looking, with relaxed syntax when compared to "real" code.
Generally in that case I would use something like run_at_start and run_30_times_a_second to cover what Unity does.
However if you have a specific definition of "pseudocode" that you have to adhere to then it may not have something that is applicable.