https://www.apkmirror.com/apk/vivaldi-technologies/vivaldi-browser-snapshot/vivaldi-browser-snapshot-3-7-2214-3-release/vivaldi-browser-snapshot-3-7-2214-3-3-android-apk-download/
Just downloaded the Vivaldi Browser Snapshot 3.7.2214.3 (arm64-v8a) (Android 5.0+) APK from @APKMirror