Audio playing through ear speaker only

Issue: Audio is very quiet, and seems to play through earpiece speaker only (not the external speakers at bottom of phone).

Details:
"cordova-ios": "^5.1.1",
"cordova-plugin-youtube-video-player": "^2.4.0",
"@ionic-native/youtube-video-player": "^4.20.0",

iOS version 13.5.1