I believe the updated title is inaccurate. The executive order comes into effect in 45 days after today meaning transactions between a US consumer and with Tencent and/or subsidiaries (as either a broad focus as in all transactions or with a narrow focus with transactions relating to WeChat) will be prohibited (as well as conspiracy to avoid prohibition etc), where subsidiaries will be determined by the Secretary of Commerce.
That neither transaction or subsidiary are defined yet doesn't mean this EO doesn't do anything specifically, just that its stupidly broad.
Yes, I've read what the White House told the LA Times, but if you believe the White Houses' word on this compared to the actual document they've put up, I've a bridge to sell you in Shenzheng.