There is already a lot of overlap between accessibility improvements and SEO best practices. And there are signs accessibility may be an explicit factor in the future.
Disabled Access Credit
How Accessibility Can Improve Your Google SEO Rankings
Everything You Need to Know About ADA Web Accessibility for 2022
The most important accessibility legal decisions and trends of the past year and what they mean for ADA compliance in 2022
How to Save 50% on Digital Accessibility Using the Disabled Access Credit
The federal government doesn't only mandate web accessibility under the ADA. It also offers up to $5,000 in tax credits for small business spending on accessibility.