Thank you very much for the help, I have found some instructions for creating an app for payment, but none of the extensions are appearing in the payment section, can you help me what should be done in this case, thank you very much in advance

I would like to add a new payment option to my store through a new provider in my country as there are currently no providers in my country?I develop the code, I want to know the procedures how can I do this in the shopify store?What is required of m...