Google has been working to improve accessibility in their documents. Depending on your needs there are several things you can do to make sure things are accessible.
Download the document as a Word Document and use the Office tools for accessibility.
Download the document as a PDF and use the Adobe Acrobat Accessibility tools
Keep the document in Google, and turn on Accessibility
Resources available for creating accessible Google documents and presentations:
Creating Accessible Documents
Creating Accessible Word documents
Creating Accessible Google Docs and Presentations
Checklist for Google Docs
Google Forms
Google Slides and presentation accessibility tips
Checklist for Google Slides
Using accessibility features in Google
Go to Google Docs, Sheets, or Slides, and open a file.
In the Tools menu, select Accessibility settings.
Select Turn on screen reader support.
Select Turn on screen magnifier support.