If you are not seeing a specific league appear on your leagues list, it could be in your 'Hidden Leagues'. To check this, tap on the 'Manage' tool in the top right corner of the screen. Scroll down the page and under 'Hidden Leagues', tap on the green '+' next to the league.
Still not seeing that league? Head to the profile icon in the top left corner of the app, select 'Help' and let us know which league you'd like to see added by selecting the Request a Feature or a League option.