You can export your contacts from iCloud as a vCard (VCF file), which can then be imported to your Kompakt device using Mudita Center
Exporting Contacts from iCloud
On your computer, sign in to your iCloud account using your Apple ID.
Click Contacts.
Select the contacts you want to export using:
Ctrl + click (Windows) or Command + click (macOS) to select individual contacts.
Shift + click to select a range of contacts.
Click the Export icon.
Click Export vCard.
The vCard (VCF file) will appear in your Downloads folder.
To quickly select all contacts:
Click the three dots in a circle icon.
Click Select All.