Please let me know if I could provide with any further information that might advocacy in favor of my application.
Is this a correct sentence? Is the word 'advocacy' in a right syntax?
Advocacy is a noun whose main usages are:
advocacy (of something) (formal) the giving of public support to an idea, a course of action or a belief
- He won the Peace Prize for his advocacy of non-violent protest.
(specialist) the work of lawyers who speak about cases in court. (OLD)
I suggest you use verbs like "back or support".