So first of all, I know that there is already a Post with this theme but thats already a year old and there is still no solution to it. ( https://support.discordapp.com/hc/en-us/community/posts/360029391591-Nitro-for-Mobile )
I bought a Gift Card for my Phone because I saw that Google Pay is an option to pay for Discord Nitro. It all ended up as a way to pay with your Creditcard connected to your Google Account so you actually cant pay with your Store Balance.
So pls make it possible.