Use patch-package to change lines 35 and 36 in this file./node_modules/@strapi/design-system/dist/NumberInput/NumberInput.mjs to this:
const numberParserRef = useRef(new NumberParser(locale, { useGrouping: false }));
const numberFormaterRef = useRef(new NumberFormatter(locale, { maximumFractionDigits: 20, useGrouping: false }));
This isn’t the ideal solution but it works.