en_tn/1pe/03/02.md

they will have seen your sincere behavior with respect

The abstract noun "behavior" can be translated with a verb. AT: "they will have seen that you behave sincerely and respectfully" (See: rc://en/ta/man/translate/figs-abstractnouns)

your sincere behavior with respect

Possible meanings are 1) "your sincere behavior toward them and the way that you honor them" or 2) "your pure behavior toward them and the way that you honor God."