As some people have already suggested:
Removing the SIM, completely disconnecting the device from the internet (or doing a fresh reset/factory wipe), then use a GOOD VPN service with forcemode settings where you cannot connect UNLESS you have the VPN established.
Tested this less than 5 days ago. USA only views. 3k+ views on 2nd video in less than 1-2 hours time (before I took it private again) (I did this not using ANY of the tips below - no normal engagement, no consuming, no watching, no following)
Additional tips:
- create the account and start behaving as a normal user for a few hours/days (consume, like, follow, watch, ...)
- crawl for USA-accounts (find USA users with high-follow rate), follow/unfollow them. If 100 USA-based users are following your account, this increases the chances of your content being shown to the USA.
- then once you have this going, post at 'active USA times'
- lastly, if you are using said VPN, make sure it's on force-mode, you don't want to drop VPN connections & switch to your local WiFi and have TikTok see it (ESPECIALLY for a new account, that looks dubious)