There is no sound in videos on iPhone

Hello! The problem is this: I updated the iPhone 15 Pro Max 512 gb to the new version of iOS 26.0.1. In general, I understand that it takes time to optimize all processes, etc. But I do not understand what kind of error occurred in this particular case.: I recorded videos on my iPhone as usual. Then, when I went into the photo, I found that there was no sound in the video. I've tried transferring it to different devices, but there's still no sound in the video. How can I solve this problem? I'm sure it's related to the new iOS.