Videos WITH sound do not have sound when uploaded or shared online

So I searched the other threads and didn’t see any answers. I tried to upload a video WITH sound to facebook and there was no audio once uploaded. For reference the video has sound when viewed in the app, video downloaded to my phone has sound. Uploaded video to FB and sound is gone. Texted the video to someone and sound is gone. Emailed the video to myself and played on my laptop, some apps played it with sound, some reported a missing codec. Is there some trick to uploading/sharing videos?