Can I set different payment methods for each product?
・When purchasing product A, you can choose both payment method A and payment method B.
・When you purchase product B, you can only choose payment method B.
・If you buy product A and product B at the same time, you can only choose the payment method A.
If anyone knows, please let me know.
Sorry for the late reply.
It doesn't seem to be possible with the Shopify standard plan. I also contacted several developers, and the responses were largely:
・Need to customize Checkout function
・You must have a Shopify premium plan to customize the Checkout screen.
・Development costs are very high
So I gave up.
I hope it will be helpful for you.