I appreciatie your engagement. But as an engineer, be aware that many of your colleagues mostly want to please their boss, and have a hard time imagining any disability. If accessibility is not on the organization’s radar, the best strategy is suggesting techniques and requirements that benefit disabled AND some other interest, such as SEO, scaling the site to mobile screens, (automatic) testing, config options that benefit multiple user groups. This will ensure that your colleagues and management have a stake in building and maintaining the accessibility features.

Lastly, I found the following video enlightening: “Accessibility [for game developers] on a shoestring” GDC 2021 https://youtu.be/PiCsvZZh5-k