This is because the app will no longer support iOS versions older than 15.1. This means that the iPhone 5s, iPhone 6, and iPhone 6 Plus will remain out of support.
So, if you use one of these models, you will need to consider a newer device if you want to continue using WhatsApp after this date.
According to the Meta company, these are common updates that are made to ensure better security and functionality on modern devices.
Since these models were released on the market over 10 years ago, this change is not expected to affect a very large number of users.
