A feature is not finished simply because it works for the person demonstrating it.
Can someone use it without a mouse? Does the form explain an error clearly? Is important information available in more than a color change? These questions belong in product development while decisions are still easy to change.
W3C's WCAG 2.2 provides testable accessibility success criteria. W3C WAI also explains that evaluation requires more than automated tools alone. Those are useful technical foundations, not a substitute for understanding the people using the product. WCAG 2.2 · WAI evaluation guidance
Put requirements in ordinary delivery work
Accessibility becomes easier to neglect when it exists only as a separate report near launch. Include relevant checks in design reviews, component work, content preparation, and acceptance testing.
For a form, consider labels, instructions, focus behavior, error recovery, and what happens after submission. Testing a successful submission alone misses the experience of someone who makes a mistake or needs clarification.
Reusable components can help keep behavior consistent, but they do not guarantee that a complete page or workflow is accessible. Context, content, and the way components are combined still matter.
Inspect the real journey
Automated checks are useful for finding some problems quickly. Add manual interaction checks and, where feasible, feedback from people with relevant access needs. Test the core journey, including interruptions and errors, rather than only the landing page.
Keep findings actionable: describe the barrier, the affected task, and the expected behavior. A count of issues is less useful than understanding which problems prevent people from completing important work.
Make careful claims
Do not turn a clean automated scan into a blanket statement that a site is fully accessible. Describe what was evaluated, against which criteria, and what remains unresolved. Legal obligations depend on context and need their own review.
Accessibility work is not separate from making a usable product. It is part of deciding who can complete the task and whether the system helps them recover when something goes wrong.