How to remove physical keyboard layout (Android 9, EMUI, Gboard)?

Question

Android

I managed to install on the physical keyboard layouts:
• Russian
• Azerbaijani
• English (USA)
• English (USA, Colemak)
• English (USA, Workman)
How to remove extra layouts? The layout list does not contain checkboxes.

Answer 1

So far, the most successful program I have found is External Keyboard Helper Demo and Pro. She manages her layouts herself. The disadvantage is that when connecting an iron keyboard, you need to switch the input method.

Answer 2

In Gboard, there is a pencil in the list of layouts at the top, click it and edit it to your health)