If you have yet to take all of your photos. Follow these steps.
If your photos are already in HEIC or HEIF format, use this website to convert them
https://freetoolonline.com/heic-to-jpg.html
OR follow the instructions for 'IOS AUTOMATIC TRANSFER MODE' located on this website or view the screenshot below.
https://www.guidingtech.com/convert-heic-jpg-windows/