You will have to switch your runtime for you web app manually. As runtimes are updated, App Services does not update your app to latest versions. I ran az webapp list-runtimes
and can see PHP 7.4 as an available runtime on Windows. I'm assuming your app is on a Linux box because for az webapp list-runtimes --linux
, it's not listed. I'm hearing though it should be rolled out next month assuming there aren't any delays.
No apologies needed. The initial announcement should've been more explicit in that the February 2020 update was for Windows images. Hope this helps.