Pubg Mobile 0.12.0 Update is rolling out slowly through Play Store /App store , be patience if you havent got. It may take time depending on device and region
Check out the full patch notes -
http://pubgmobile.com/en-US/news_detail/webplat/info/news_version3/35372/35373/35374/35386/35387/m20497/201904/804220.shtml
