The platform and designs meet the latest accessibility standards by default, however customizations added can alter the level of compliance with accessibility standards.
In general:
-Make sure to fill out all fields in the admin that mention ADA with useful, descriptive text.
-If using custom sliders, consult the Custom Slider wiki page to get the format for adding alt text. See: SliderAltText
-If customizing font colors and sizes check if their contrast ratio is compliant at https://webaim.org/resources/contrastchecker/
-Do not leave fields such as page title and category title blank, as this can cause errors for screen readers and result in a lack of H1 tags for a page.
If in doubt open a support ticket to inquire about an accessibility review.