If you are following the updates of iOS you would have found that iOS13 has made a big change in its GPS location function, which is totally different from the previous versions. Many apps are influenced.
This change has made our product has a distance limit on iOS13 (Can run on iOS13, but can only fake a location within around 20km from the real location).
If you only need to fake to some location within 20km, you are not influenced. However, if you need to simulate somewhere far away. You will need to do more steps than before.
And for some usage that spoofing is not allowed by the App/Game. We highly recommend to stay at iOS12 to enjoy a perfect experience.
Please see the following guide: