1. First, open the League of Legends Pocket League APP in your mobile phone and find the activity center function in the red circle, as shown in the figure below:
2. After entering, select the end function in the red circle, as shown in the figure below:
3. Then find the function of "summoner please come back", as shown in the figure below:
4. After entering, you can see the initial registration time. Take April 2020 as an example. The LOL age of this account is 7 years, as shown in the following figure: