This is Finley from the Social Care team at Shopify.
To see a full list of payment provider options, you can select the country your business operates from here.
Shopify Payments specifically, is supported in these countries. If you're eligible, this should be the first payment provider you see when you're in your Shopify admin > Settings > Payments.
If you don't see this option, despite meeting the requirements for Shopify Payments, please contact our team through the Support section of our Help Center, and we'll be able to take a closer look at your account: (https://bit.ly/39RZ8ZG).