Have clear labels in order to communicate with users and provide context. Labels must be persistent. The label cannot be visually hidden. Relying on color or shape alone excludes users with visual impairments or color blindness cannot perceive color or subtle changes in shape effectively. In addition, turning off the label violates WCAG 2.1 Guideline 1.3.1: Info and Relationships and WCAG 2.1 Guideline 1.4.1: Use of Color. If the progress value is only visual, screen readers cannot interpret and announce it without a an accessible label. If the progress value is
Describes what the indicator represents to assistive technology. The selected index number will be appended to the label.

Interaction and Style

Info and Relationships
Ensure information, structure, and relationships conveyed through presentation can be programmatically determined or are available in text. This means use proper HTML elements to structure your content, so it makes sense when read by assistive technology.
WCAG 2.1 Understanding 1.3.1
Focus Order
If a Web page can be navigated sequentially and the navigation sequences affect meaning or operation, focusable components receive focus in an order that preserves meaning and operability.
WCAG 2.1 Understanding 2.4.3
Name, Role, Value
For all user interface components (including but not limited to: form elements, links and components generated by scripts), the name and role can be programmatically determined; states, properties, and values that can be set by the user can be programmatically set; and notification of changes to these items is available to user agents, including assistive technologies.
WCAG 2.1 Understanding 4.1.2