Hi @rebeccasilva0 👋 Showing ALL available payment options on a product page that go to checkout for that payment method is an advanced theme customization.
To just show payment badges see this snippet and use a custom-liquid block if available.
https://shopify.github.io/liquid-code-examples/example/payment-icons
For the various checkout-button types, read the manual thoroughly and know the differences.
Express checkout buttons are in the checkout , generally top of page; and they have a lot more space to not be crammed into.
Cart and checkout are separate thing; further products are not line items, lines items are products that have been added to a cart.
Product description pages use accelerated checkout buttons, aka dynamic checkout buttons, are tuned for the current users optimum payment method
https://help.shopify.com/en/manual/payments/accelerated-checkouts
yes shopify made this a confusing mess.
Meanwhile it's generally not recommended to muck how payment methods show unless you actually know what your doing and have the budget to back it up with ab-testing.
Otherwise just let accelerated buttons do what they are made specifically to do.
If you need this customization then contact me for services.
Contact info in forum signature below ⬇ ⬇ ⬇.
ALWAYS please provide context, examples: store url, theme name, post url(s) , or any further detail in ALL correspondence.
