Unfortunately all deposits need to come from on-chain transactions. Fiat funds cannot be transferred in or out of the card.
Transferring funds directly on or off the card is considered a transfer of value, which is prohibited by FinCEN, because it can be abused for money laundering. Regardless of your intent, it is prohibited, and is not allowed by any entity in the payment structure such as Laso, our issuers, our issuing banks, and others.