Was in a ranked game before EUW exploded and won it, but it didn't come up on my match history and I didn't get my 20LP, will i get it when euw is back?
Give it a few hours. It usually should catch up, but if it doesn't, then the LP is as good as lost.
I had this issue once and emailed Riot support about it, but they couldn't give me the LP for it and gave me a 4 win IP boost instead. Which is kind of worthless since I have like 130K IP and I'd rather have the +22LP -__-