Please note that Telegram is not a Russian company; it is registered in Great Britain. Russian government doesn't have any jurisdiction over it.
Also, russian users are less than 10% of Telegram userbase.
So now Apple is putting sanctions upon a British company just because Russia says so.
This sets a dangerous precedent. What will we see tomorrow? China, Thailand, Iran and North Korea kicking apps they don't like out of App Store? Apple banning apps on political grounds?