> Are all of these unsuitable [0]? [...] I looked it up and people had problems selling to Brazil [1] but there are various listings that offer to ship.
Do these phones have ANATEL certification? Because if they don't, they will be rejected by customs. It's not simply a case of the item being held until you pay a 60% import tax.
There are [1] people currently using GrapheneOS in Brazil. You can ask on the forum and you might get more clarity. The Motorola Signature will be announced in a few days but is a high end flagship with all-around better hardware than the Pixel 11 Pro XL and it's cheaper, but it's still a flagshio.
[1] https://discuss.grapheneos.org/?q=brazil%20