Seeking Guidance: Custom "Next Error" Focus Navigation After Form Submission

Hello,
During recent testing, a blind participant raised a compelling navigation request for multi-error forms, and I'd value your insights on feasibility, precedents, and WCAG compliance.
User Context:
After form submission, focus lands on an error summary <ul> listing all issues (e.g., "1. Name required", "2. Email invalid"). Users Enter a link to jump to the field, hear the inline error, fix it, then blur/tab.  
The tester requested an optional toggle ("Enable error-only navigation") so that post-fix, instead of tabbing to the next element in DOM, JS auto-focuses the next invalid field ahead in form order.
Example Flow:  
1. Summary focus: "2 errors found."  
2. Enter on "Name" link → name field focus + "Name required."  
3. User fixes → blur → auto-focus email field
4. Repeat or submit.
To my understanding navigating between sections and form fields with shortcuts should be enough for a screen reader user to fix all the inline errors in a form.

- How useful would this be for screen reader users working through multi-error forms?  
- Does the programmatic focus shift from fixed field → next error violate WCAG 2.4.3 Focus Order?  
- Are there existing examples of this pattern in production forms?
 
Would love to hear your opinion on that. Thanks for helping!
 
Best regards,  
Grigory Rogov