You know words can have more than one definition, right?English as a second language.ESL?honest question: are you guys ESL?
"protocol" seems completely fine to me in that sentence.
https://www.etymonline.com/word/protocol
Meaning "diplomatic rules of etiquette" in English first recorded 1896, from French; general sense of "conventional proper conduct" is from 1952.
https://www.ahdictionary.com/word/search.html?q=protocol
n.
1.
a. The forms of ceremony and etiquette observed by diplomats and heads of state.
b. A code of correct conduct: safety protocols; academic protocol.
2. The first copy of a treaty or other such document before its ratification.
3. A preliminary draft or record of a transaction.
4. The plan for a course of medical treatment or for a scientific experiment.
5. Computers A standard procedure for regulating data transmission between computers.
Yeah, more than one definition and most of them from 20th century institutions.
This is as bad as when bronze age woman told me something is overrated in Tyranny.