A little while back I purchased an iPhone 13 Pro. I got it largely for the quality of the camera. I edit my photos with Lightroom. Lightroom does not handle HEIC images very well at all. I did some searching for ways to convert. I have MacOS Catalina. I was looking around then remembered that I have WaltR Pro. This company has great products. I searched and found the same company has a free App for converting HEIC to Jpegs. And it takes only seconds.
You can get it here: WALTR HEIC Converter