Hm it looks virtually identical in this article: https://arstechnica.com/gadgets/2021/02/harmonyos-hands-on-huaweis-android-killer-is-just-android/

And I didn't read all of it but for example the Ark compiler you mention:

"As basically the earliest component of HarmonyOS, surely there would be some meat here, right? The HarmonyOS Application Fundamentals page now doesn't mention the ARK Compiler at all. Googling around for what in the world happened to it reveals that developers also criticized the ARK Compiler as "a scam" at launch and said it was "not even half-finished." The original page for the ARK Compiler now 404s, and Huawei's repository for the ARK Compiler is dead, too."

(And yes it's indeed a 404)

Also includes a screenshot of the "DevEco Studio" SDK which is all Android components...