I use a Yubikey Nano with my Pinebook Pro and constantly have problems with the OTP slots triggering unintentionally. This tiny part clips onto the Yubikey and prevents it from detecting touches.
The fit is likely specific to the Pinebook Pro's USB port.
To remove without pulling the Yubikey out, grab a corner and “roll” the 'touchtector off.
The author marked this model as their own original creation.