how i ACTUALLY set up my phones for hitting 90%+ US audience on tiktok while living in slums of Mumbai
get a used iphone, factory RESET that mf and set the region to United States.
skip Apple ID for now and TURN OFF location, bluetooth and tracking.
you can either use Proxy or VPN both works (go for new york region) if you're non technical use VPN. i personally use the Surfshark with dedicated IP.
create the Apple ID, use an email, if it asks for number verification. use otp verification sites ($0.40 per otp) then download Tiktok.
when you're signing up on Tiktok, tap “phone number” for sign up option and check if its shows +1 automatically, wallahi you made it to US tiktok.