You can find these legacy .ipa files on community-driven preservation sites:
The first versions of Subway Surfers were optimized for iOS 6. These legacy IPAs: subway surfers ios 6 ipa
Subway Surfers was compatible with iOS 6, which was released in 2012. The game's early versions were designed to work on older iOS versions, including iOS 6. You can find these legacy
Keep in mind that older iOS versions and devices may not receive updates or support from developers or Apple. subway surfers ios 6 ipa