The text component is missing any type of decorative options like strikethrough or underline: Text
This seems to be a general polaris web component issue. Strikethrough is a basic option for commerce to display discounts so it feels like a major miss here.
Adding my vote here. I’m building a checkout UI extension on api_version 2026-01 and need to display a compare-at price with strikethrough. I’ve confirmed that style, accessibilityRole="deletion", as="s", and emphasis all either crash the extension or have no visual effect in the current web component API. The only workaround is Unicode combining characters (U+0336) which renders inconsistently across fonts.
This is a basic e-commerce pattern, showing a crossed-out original price next to a discounted price. A strikethrough boolean prop on s-text, or support for text-decoration via inline style, would solve it.