HTC is widely regarded as a smartphone OEM on the ropes. Now, AppBrain's data on the company has shown that it has taken 9 of its apps, inlcuding its in-house Sense launcher, off Google's Play Store between February and April 2019. This could be a bad sign, but may also mean that the company is simply re-designing or re-assigning them.
https://www.notebookcheck.net/HTC-has-discontinued-9-of-its-own-Android-apps-in-the-last-3-months.415989.0.html