Hi @siaeva i got the fonts installed on my site, and use it with succes on all the pages.
@marcd I am looking to use my theme font on the text in the Shopify buy button. I am not able to understand the github link (unfortunately). Would be grateful if you could explain me how you solved it:)
Set iframe: false to productSet component . Refer https://shopify.github.io/buy-button-js/customization/