Yes, the Dynamics 365 Business Central mobile app can be used in a GCC High environment. However, there are some limitations and requirements to consider.
First, you need to ensure that the mobile app is enabled in your Business Central environment. This can be done by your system administrator.
Secondly, the mobile app requires that your Business Central environment is accessible from the internet. If your environment is behind a firewall, you may need to set up a VPN or use a remote desktop app to access it.
Thirdly, some features of the mobile app may be limited in a GCC High environment due to compliance requirements. For example, the mobile app may not support certain third-party add-ons or integrations that are not approved for use in a GCC High environment.
It's always best to consult with your system administrator or Microsoft support to confirm if the mobile app is supported and to address any potential limitations or requirements