Some Huawei devices don't support Google services on Harmony OS. Here's a workaround on how to install Stoic without them.
Begin with opening App Gallery on your Huawei Device:
Type "gspace" in the search field:
Tap on the install button:
Open Gspace app from your desktop:
Tap on the "Start" button and allow the app access to your device information:
After the loading is completed, use your Google credentials to log in to the Google services and tap on the "I agree" button:
You will be redirected to Google Play Store where you can download the Stoic app: