Why social security cards: some have photos and some don't? Where did the photo come from?

Now the social security card photo is automatically called the second-generation ID card photo in the networking system. However, although some ID cards are the second generation, they were done before the system was connected to the internet, which means that photos cannot be automatically called without the enjoyment of * * * in the system. Or, the social security card and ID card are not in the same area. For example, the ID card is at home and the social security card is at work. The information in various places has not been connected to the internet, so it can't be enjoyed. If there are no photos, I will be asked to provide photos that meet the requirements myself.