It seems like a VPN and only using the web app is effective, but it will show the warning that you’re using a VPN to other users in your profile. If you’re fine with that then that’s fine. It indeed may take a while to update:
If you use an App Store or Play Store version of the app it will also show your app store region, which a VPN does not change on its own. The best case here is just to limit public exposure as much as X allows:
I moved this topic to Questions since you wanted answers and not discussion.