Re: "iPad: Apple funds not working for in app purchases" " ... the purchase hasn’t gone through. Do you guys know how to fix this and if it’s a glitch or what the problem is? Because I have 10 dollars in my apple account"
We can't guess for sure why your purchase hasn't gone through, from the info. provided.
Also, we are all Apple users, like yourself, so have no access to your account or details.
Have a look at some of the possible causes / solutions below.
You may have in-app restrictions / screen-time / content / restrictions set:
Manage App Store purchases, settings, and restrictions on iPad - Apple Support
You may be trying to purchase something that is not available in your country or region:
Availability of Apple Media Services - Apple Support
Apple may, or may not, be able able to accept an Account Balance in your country or region
See which: Payment methods that you can use with your Apple Account - Apple Support
Not everything online or in apps can be purchased using an Apple balance.
Eg: The app developer may require a different payment method for in-app purchases
or The in-app purchases may cost more than $10 Account balance:
About purchases not billed through the App Store or the App Store’s In-App Purchase system - Apple Support
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If needed: For more info. / support / contact options etc:
How to contact an app developer - Apple Support
Billing Support Website: Subscriptions and Billing - Official Apple Support