I switched to ubuntu touch yesterday. I could import my apple contacts by:
- Exporting contacts to vcf file on my Mac,
- Booting my Mac on ubuntu 18.04 LTS
- Connecting nexus 5 to my Mac running ubuntu (Mac finder does not mount the nexus 5 running ubuntu touch)
- Copy the vcf to the Documents folder on the nexus 5
- Tap the vcf to open
- Select the option to open with another program
- Select "Contacts"
P.S. Import function directly from Contacts apps does not work. It does not find the vcf in the file system.