The number 7 is seen as lucky in slots and pop culture because it’s been tied...

https://casinocrowd.com/why-do-people-say-seventh-heaven-unpacking-the-mystery-behind-the-phrase/

The number 7 is seen as lucky in slots and pop culture because it’s been tied to good fortune for centuries. Classic reels often show triple 7s (777), signaling a big win