or get a better lock screen that does not open up immediately. i also found that if you have a phone with a fingerprint lock that your phone will never unlock on its own while in your pocket. i never have any issues on my note 10+ unlocking while in my pocket.
plus i have never heard of an app that you need to confirm outgoing calls. even if there was one where another popup asking to confirm that you want to make a call, you can still butt select the option to confirm and thus the call will go forward.....i do not think an app exists.
so........i think your best option is to find a lockscreen that will work for you.
