Fifth platinum

Why is not fifth platinum available to everyone?
Why do some players have it, and others it is available with 100 lvl.?

for example PANZAR.


Your 2nd screenshot already has a 5th stripe…? Am I missing something?

second screenshot of another player. Russian players do not have access to the fifth platinum panzar. others have it. this is strange.

Just tap promote… It may say u can’t… But u can.