I am a little confused by a Security Alert Revolut for iPhone users (Apple devices).
A little while ago, today, September 9, 2022, I received an alert on the mail where Revolut asks me to do urgently an update software to the latest version of iOS, to remove two secure problems. Alert sent by Revolut by email, as if the Revolut application on IOS It would not have Push notifications and could not exactly identify which version of iOS has each connected user.
A very good measure has revolted to notify their possible or real clients of security problems with which they connect to the Revolut account. But I am a little confused by the speed of this measure.

Revolut security alert for iPhone users
Hi laurentiu,
Apple sent out a notification on Wednesday, August 17, warning of two security issues within their operating system, and advised users to update their devices to the latest version to resolve them.
Since you’ve previously accessed your Revolut account from an iOS device, we advise you to follow this recommendation as soon as possible.
Has it took almost three weeks for Revolut to trial a security notification from Apple? Most likely the American company was also waiting for "call center".
To update iOS to the latest version, go to Settings → General → Software Update.