As of the release the recovery of Argent Starknet mobile wallet is possible off-chain only, however, in future, on-chain recovery of the wallet with Starknet guardians is planned.
If you have your encrypted key, you can proceed with the off-chain recovery.
In order to be able to recover your Starknet wallet alongside with Vault and zkSync wallets, you will need to save or update your encrypted key.
You can find the guide on saving the recovery key here.