Thanks for the question. Bottom line, I would take a look at the fiat currency you want to buy btc with, and see what the current Robosats offers are in that currency. Just use whatever payment method they all are doing.

Most of the fiat payment methods are KYC. Like Strike, Revolut, CashApp, etc. Actually, that's only the ones I recognize. I just took a look at the current offers, here's some of the top payment methods:

20 - SEPA 16 - Revolut 12 - Strike 6 - Zelle 5 - Wise 1 - CashApp

There's a bunch of others - Monero, USDT, and a lot of others that I don't recognize. And some that say "other". Don't know what that means.

The trades for the Brazilian Real are in some payment methods that I haven't heard of (PIX? AirBnB gift cards?). So I have no idea about the privacy of those methods.

F2F is very uncommon and has risks of its own. Also I know on Bisq there's this elaborate protocol for trading with cash by mail. It's interesting to look at, if just out of curiosity - https://bisq.wiki/Cash_by_mail