This is not RTL support but support for ways to explicitly set styles based on the direction.

Better than using rtl:ml-4 is to use ms-4 which stands for margin-inline-start: .... Prefer logical properties over physical ones. But that is not possible in all cases. There, rtl: and ltr: prefix come handy.

Moving to Tailwindcss make it hard to implement bidirectional text support unless we define new rules to use logical styles.