I’m in charge of a11y at work. I always stress to other development teams that they need to test if their work is inclusive.
Some simple steps does it.
Run tools like Axe. Does it pass?
Navigate using a keyboard.
Use the page using a screen reader.
This is a minimum a team should do before submitting the merge request.
Over time this has lead to better quality. But you need to constantly keep testing and focusing on it.