The UAE requires decryption keys as part of their Telco regulations.
If Telegram can operate in the UAE without VPN (and it can), then at the very least the UAE MoI has access.
They (and their shadow firms like G42 and G42's shadow firms) were always a major buyer for offensive capabilities at GITEX.
On that note, NEVER bring your personal phone to DEFCON/Blackhat or GITEX.
Edit: cannot reply below so answering here
Cybersecurity conferences.
DEFCON/Blackhat happen during the same week, so you have a lot of script kiddies who lack common sense trying to pwn random workloads. They almost always get caught (and charged - happens every year), but it's a headache.
GITEX is MENA and Asia's largest cybersecurity conference. You have intelligence agencies from most of the Middle East, Africa, Europe, and Asia attending, plus a lot of corporate espionage because of polticially connected MSSPs as well as massive defense tenders.