Not really. Whatsapp is used by every person in Brazil, yet didn't get around a temporary ban [1]. Telegram gained about 1.5 Million people switching to telegram in a day. [2]

Whatsapp didn't win many users, even when Telegram was banned in Russia for months.

Telegram even worked in Belarus despite the whole internet shutting down there. [3]

[1] - https://techcrunch.com/2016/07/19/whatsapp-blocked-in-brazil...

[2] - https://www.theverge.com/2015/12/17/10386776/brazil-whatsapp...

[3] - https://www.latimes.com/world-nation/story/2020-08-21/telegr...