You can add more apps than just two to a folder, to keep your Huawei device's home screen clean and tidy. If you open up a folder, you will find the subsection "add". There you can add more apps which will then be moved to the folder.

Note: Adding an app by dragging and dropping it still works, it is just easier to use the add function to move more than one app.

Android 10 | EMUI 10.0
Step 1:  Tap on a  folder
Step 2:  Tap on  Add
Step 3:  Choose the apps and confirm with  OK
  1. Tap on a folder
  2. Tap on Add
  3. Choose the apps and confirm with OK

Huawei Instructions