You can access your wallet directly by logging into your MoonPay account here.
You’ll have access to both your BTC and ETH wallets in your MoonPay Account. If you do not have these wallets displayed on your account, you just need to continue to the purchase flow and the option to use your MoonPay Wallet will appear.
Once you have these wallets in your MoonPay account, click on the three dots in the upper right-hand corner of the card to see further actions you can perform, such as sending your crypto or viewing your secret phrase.
Please make sure you copy your secret phrase as without it, you won't be able to recover your wallet. You can use the secret phrase to access your wallet through different wallet providers.