@Pmalek, the instruction above applies only to accounts associated with the Envoy mobile standalone wallet.
If Envoy's account is relevant to paired Passport device in my case Passport Core then there is currently no option to export or import labels and tags.
I did create a hot wallet just for testing purposes to check the export/import feature, but didn't pair Envoy with a hardware wallet. It's interesting that the option would be missing for your paired Passport Core. When you access "Advanced Backups", is the option not there at all or is it greyed out?
That said, for Envoy standalone wallets, there is an option to import labels and tags using the BIP-329 format. Here's how:
1) From the Account selection, tap on the two horizontal lines on the top left.
2) Tap "Backups."
3) Tap "Advanced Backups."
4) Tap "Download Settings&Metadata..."
That option downloads (which means exports) a file with all your settings and metadata (labels) that you can save on your device. I don't see an import button. How do you import your labels from the same downloaded file or another BIP-329 compatible file?