For sighted users it is not apparent that the list of field types is a list of radio buttons - in Claro you have a radio button per field type/field group. Therefore sighted users might expect a different keyboard interaction pattern, they might try to use the tab key as well as the up and down arrow key alongside the left and right arrow keys (check field_types_keyboard_interaction.mp4).
By using the tab key you can see you only get the first field type in focus. then you get to the continue button next, shift tab then gets you first to the last field type telephone number and then out of the grid. If you get now into the grid again by pressing the tab key and then use the arrow keys instead, you would expect maybe the arrow up and down keys would work the same as the arrow left and right keys, but they don’t, only the arrow left and right keys work.
Discussed and iterated on the issue with @mgifford, @the_g_bomb, @katannshaw, and @drupa11y
admin/structure/types/manage/page/fields/add-field and try to navigate the field type and field group selection by keyboard.Active
4.0
User interface
It affects the ability of people with disabilities or special needs (such as blindness or color-blindness) to use Drupal.
Interesting. It works as expected in the Add Field Page.
But not in the Add Field Dialog.
This occurs in Claro too, so is a Core issue.
In Drupal core changes are made on on 11.x (our main development branch) first, and are then back ported as needed according to the Core change policies → . Thanks