What is lock icon in Flames tab in Gas app?

so what is a lock icon in the Flames so here you just see where it says from gastine for example from the left is just a flame icon but what it's if it's a lock icon so basically it's uh means that you revealed this person so you were subscribed to the god mode and then uh you just basically tap reveal button and you reveal some of someone and you can do it like two times per week so after that you just know that this flame was revealed