EDIT: As of 4.23.0 ARRR (Piratechain) iOS will now sync.
iOS users will not be able to sync ARRR until a future update that resolves the syncing issue. We do not have a timeline for this fix.
ARRR users can export key their private key by tapping Assets > Tap on the ARRR wallet > Tap on the three vertical dots ( ⋮ ) > Tap on "Master Private Key." You will need to enter your password to unlock the key. NOTE: do not store this digitally as this does grant access to your funds.
You can enter that private key in the one of the official ARRR wallets found here: https://piratechain.com/wallets/.
NOTE: we will have this fixed in the near future these steps are not necessary unless you need immediate access to your funds.