Re: What should I do if my subscription is still pending from the App Store?
Seems your transaction from your financial institution is taking time to go through.
Re: If you can fix that issue please let me know
We are all Apple users, like yourself, in the community, so no-one here can access your account or details.
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Re: if there’s anything else I can do to help you out with this issue please let me know
A few thoughts for assisting with your own needs:
If this is an international transaction, you could check whether your payment method can be used ok,
or if the bank / financial provider / requires some approval before such a transactions can be processed.
You can check that the payment method you have in your Apple Account is one that Apple can accept in your country or region: Payment methods that you can use with your Apple Account - Apple Support
If needed : Check expiry date on payment method is valid.