The number of confirmations needed depends on the wallet you are sending funds to. Some wallets require 1 confirmation, while some other wallets require 3+ confirmations.
Note that only the supported assets in the wallet will be credited, Shuffle is not able to retrieve deposits made in unsupported assets.
You may find your deposit history here: https://shuffle.com/transactions/deposits
If you have made an error in your deposit, you can review our article here.