The L on an instant pot means "low" when your instant pot gets done cooking the Instant pot will usually go into the Low setting.
The Low setting on the Instant Pot keeps the food warm until you're ready to eat the food.
On the instant pot when the instant pot pressure cooking cycle finishes, the instant pot cooker beeps and automatically goes into the "Keep Warm" cycle, called Auto “Keep Warm” Cycle.
The Instant Pot LED display shows an “L” on the first digit, such as "L0:02", to indicate the “Keep Warm” cycle and time duration.
The Instant Pot clock counts up for 10 hours.
Instant pots are wonderful cooking appliances as you can basically put the food in the instant pot and set it and go do something else and the food cooks pretty fast.