If your Shopee account is banned, you may not be able to view your username directly. However, you can try the following methods to find your username:

1. By email: Check the email address you used when registering your Shopee account. Usually, your username will be displayed in the registration confirmation email from Shopee.

2. By SMS notification: If you provided a mobile phone number when registering your Shopee account, you may receive a SMS notification containing your username.

3. By contacting customer service: You can try to contact Shopee's customer service team, provide them with your registration information, and ask for your username. They may ask you to provide additional verification information to confirm your identity.

Remember that if your Shopee account is disabled, you may need to resolve issues with Shopee to restore your account.