For a mobile app:

We examine everything page by page and log all errors into a central database.
We then convert that content to Jira tickets, complete with descriptions, screenshots, and story points.
If we work with a third party, and one of its tools is not accessible, we work with them to make it accessible.

it looks similar to the service Sentry.

WebAIM says the most common types of WCAG 2 failures comprise 96.8% of all accessibility errors.

• Low contrast text
• Missing alternative text for images
• Empty links
• Missing form input labels
• Empty buttons
• Missing document language

The % of these errors is diminishing over time though