https://www.apkmirror.com/apk/facebook-2/work/work-291-0-0-45-120-release/workplace-from-facebook-291-0-0-45-120-3-android-apk-download/
Just downloaded the Workplace from Meta 291.0.0.45.120 (arm64-v8a) (560-640dpi) (Android 8.0+) APK from @APKMirror