Recover screen recording audio if microphone was off? Important audio 🙁

I screen recorded a phone call that I didn’t realize there was a second option to turn microphone on or off so it didn’t capture the audio!! Can someone please tell me there is a way to save it. Or recover the audio?! It was my sister announcing her pregnancy to my grandparents who don’t live in the country here 😭 someone save me from my shame and disappointment in myself for not know this was a separate setting 😭