Solved
Stadiums
Why can't I open any stadiums I'm on about level 80 fc mobile
so - you can post screenshot in here by sliding the footer on the “reply” screen to the left (the one with B I etc) until you see the camera and the paper clip icons
as for your question on the stadiums - you can collect them through the star passes - I think a lot of them are in the paid section, so that could be why they remain locked for you
I have a few more than you, but I don’t always but the star pass, so many of mine are locked as well
