OnePlus sells phones direct in US markets. They're the only Chinese company with phones that have all US wifi bands too. Wifi is likely to suck with an imported phone. Only some of them support custom ROMs though, like the OnePlus 12R does, but not the OnePlus 12 (all ROMs are just now in alpha almost a year after launch).

GrapheneOS is the most secure and privacy-oriented ROM available though and because they're security first, they only support Google phones due to some hardware features other vendors don't have. Graphene devs got access to a confidential cybersecurity chat and found that other than newer iPhones, Android w/ Graphene was the best option against government cracking software if you're legitimately concerned about your phone being taken by authorities.

Personally, I'm not concerned about that, so I'm okay with something like LineageOS w/ Aurora Store, etc because Google phones are objectively worse (in hardware) than every other phone at the same price point.