Accessibility: role="radio" payment option missing required aria-checked when no selection

[sundy001]

Describe the bug
The payment payment option buttons are implemented with role="radio" but does not have aria-checked="false" when the user hasn’t selected any payment method yet. According to the WAI‑ARIA specification, when using role="radio", the aria-checked attribute is required (not optional).

Spec reference:
https://www.w3.org/TR/wai-aria-1.2/#radio

To Reproduce
Steps to reproduce the behavior:

1. Go to any payment page which use Dropin from @adyen/adyen-web/auto.
2. Ensure no payment method is selected
3. Inspect the payment method element(s) that use role="radio" (e.g., in DevTools Elements panel).
4. Observe that aria-checked is missing (it should be present and set to "false" for unselected radios).

Expected behavior
All elements with role="radio" should always include aria-checked.

Screenshots

Desktop (please complete the following information):

• OS: macOS 26.2
• Browser chrome 144.0.7559.135 (Official Build) (arm64)
• @adyen/adyen-web@6.29.0

[m1aw]

Hey @sundy001

This is indeed a bug we will fix it in one of the upcoming release.