There is usually a waiting period of two to eight days due to chargeback risks before funds that were deposited to FTX via credit/debit card or ACH can be returned. This is unfortunately industry standard and entirely dependent on the speed of the card issuer and the Visa and Mastercard networks. Typically debit cards release authorization holds within a few days and credit cards can take somewhat longer.

For more information, there's a helpful article here: https://help.ftx.us/hc/en-us/articles/4408456783639-General-Information and here https://en.wikipedia.org/wiki/Authorization_hold.

In case you have already been waiting for more than five days since your original deposit please go to Settings > Account  and tap the “FTX trading support” link at the bottom to open a ticket directly with the FTX customer support team.