Issues with AWS IPSec when accessing from UAE

[revenew]

Hello,

I set up a pfSense device in EC2 instance in AWSand configured to support IPsec from ios devices.
While the connection is working properly, and also the internet access from USA and Europe, some of the users from UAE can't access the internet or have poor connection speeds.

I'm looking for recommended diagnostics or monitoring tools for looking at the traffic and try to diagnostic the problem.
Maybe anyone here did encourage the same issues and have an idea what's the source of the problem?

Thank you.