Here are the countries restricting access to WhatsApp
Briefly

Russia has started restricting some WhatsApp calls, citing failures in sharing information related to fraud and terrorism. China has fully blocked WhatsApp since 2017, with users opting for WeChat. North Korea also limits internet access, making WhatsApp generally inaccessible. The UAE has mostly banned VoIP applications since 2017, allowing calls on WhatsApp during the Expo Dubai. Other countries like Qatar and Egypt impose partial restrictions on VoIP calls. Uganda and Cuba have also experienced temporary bans. Turkey has a history of blocking WhatsApp over domestic issues.
Russia has started restricting WhatsApp due to dissatisfaction with the platform's handling of fraud and terrorism information requests, following years of conflict with foreign tech platforms.
China has blocked WhatsApp since 2017, forcing users to rely on WeChat as the main messaging service, whereas North Korea has severely restricted international internet access.
While the UAE has banned most VoIP services since 2017, calling via WhatsApp was allowed temporarily during the Expo Dubai, as messaging services remain operational.
Although Egypt does not outright ban WhatsApp calls, authorities have been known to throttle these communications, indicating a restrictive internet policy in place.
Read at Fast Company
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