Perhaps you are right. Unfortunately I’ve forgotten lots of the linguistics of Spanish :(

In Mexican Spanish, you would default to formal ‘you’ in most public interactions (although not all people do this). You would also use formal language when talking to a teacher or an authority.

• Formal ‘you’ (singular): usted
• Formal and informal ‘you’ (plural): ustedes
• Informal ‘you’ (singular): tú

Note that the informal and formal ‘you’ in plural are the same.

Fun fact: formal language in Spanish is more than just formal ‘you’.

E.g., if you’re working at a fancy shop and wanted to ask a customer “how may I help you?”, you would say “¿en qué le puedo ayudar?” (formal) instead of “¿en qué te puedo ayudar?” (informal). This question does not have ‘you’ in Spanish.