I am running Drupal 10.2 with the USWDS Base template. If I add a USWDS accordion to a page using the GUI button or through source code and edit the aria-expanded to "true" and then save, the accordion does not display as expanded and the code has reverted back to aria-expanded="false".
Add an accordion with content.
In
Active
2.0
Code
That's the converter. Will need a setting or button to allow for defaulting one open.
Believe once ✨ Porting Accordion Options dialogue box Active lands this should be fixed.