Workplace controls can 'disappear' when different Windows Accessibility Contrast themes are selected.
While accessibility improvements have been and continue to be made, users can change their Windows contrast and still have issues navigating the Workplace app.
Official accessibility support in these configurations is desired to support government clients.
Example: Using the "Aquatic" setting (see below on how to set), there were still multiple WCAG findings using a browser accessibility test tool related color contrast ratios.

Steps (Windows PC):
Settings -> Accessibility -> Contrast Themes
Choose Aquatic
Navigate to Workplace