I unfortunately upgraded my Boldbeast to version 14.0 then 14.3. In neither of them can I find the option to 'Auto switch speaker on'. Can you tell me where it is hidden? My telephone is a Samsung Galaxy S9 (SM-G960F) running Android version 10.
Android 10 no longer allow an app to switch the speaker on/off during a call, so the option is hidden.
On Android 9 and old versions the option is available.