How to fix device icon of MacBook Pro on iCloud (iPad, iPhone)

Hey there,

As you can see on the attached screenshot of my iPad Pro (same on iPhone X) my MacBook Pro (2017 with TouchBar) is not listed with device name and correct icon. Instead, it is listed as Mac with a Sierra-icon (even if the MacBook Pro is on High Sierra) ... How to fix this?

Notes:

- This is *not* happening on iCloud.com as you can see on my 2nd screenshot (fun fact: Apple TV is not listed here)

- This is happening in the Apple Support app too as you can see on my 3rd screenshot