正式的英文：
formal; official; regular
发布的英文：
publish; issue; announce; release
正式发布的英语可以用一下单词或短语:
released; ios; official launch;
[例句]还没有正式发布逮捕这些人的消息。
There has been no official announcement of the arrests.
【例句】这个文件今天正式发布。
This document is released today.
【例句】产品正式发布的时间尚未确定。
The official release of the product has not been confirmed yet.
Officially released
Officially issued/released/published/announced
你这个比如有意思...
Coming online officially也可以吧