This feature is only available for Huawei AppGallery customers in Malaysia.
If customers have selected Malaysia as the country of residence for their Huawei AppGallery account settings, they can see Touch 'n Go eWallet as a payment option.
Below are the articles that may be useful for you :
How do I make payments using Huawei AppGallery auto debit with Touch 'n Go eWallet?
Are there any additional fees when using Touch 'n Go eWallet for Huawei AppGallery purchases?
How do I remove Touch 'n Go eWallet as a payment method?