Import Shelly 1 with button type "momentary"

[frifd82]

Checklist

• - I have updated to the latest available Home Assistant version (now 2021.10.6).
• - I have updated to the latest available Shelly firmware.

Describe the issue you are experiencing
When I import a shelly 1, via native integration, on which I set the button type to "momentary", the switch "input" entity will not be created.

Describe the behavior you expected
If I import a shelly device 1 I should also import the "input" entity that can be used in automations to intercept the various types of button clicks

Steps to reproduce the issue
Import shelly 1 from native integration

What version of Home Assistant Core has the issue?
2021.10.6

What was the last working version of Home Assistant Core?
No reply

In which browser are you experiencing the issue with?
HA, Chrome, Fiefox and Edge for iOS

Which operating system are you using to run this browser?
Windows 10

State of relevant entities
No response

Problem-relevant frontend configuration
No response

Javascript errors shown in your browser console/inspector
No response

Additional information
No response