1. First disable dynamic checkout button by going to theme customiser -> product page -> sections -> product pages -> uncheck Show dynamic checkout button


2. Go to online store -> themes -> select theme -> actions -> edit code -> product- template.liquid file under snippet folder.


3. Add checkout-x-buy-now-btn to the following code, please see the screenshot below:

Reference: https://help.checkout-x.com/en/articles/2878056-using-a-buy-now-button-with-checkout-x

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