Here are a few links that help with creating accessible documents:

Adobe

https://helpx.adobe.com/indesign/using/creating-accessible-pdfs.html

https://helpx.adobe.com/sign/authoring/create-accessible-pdfs.html#:~:text=Open%20the%20PDF%20in%20Acrobat,Accessible%20from%20the%20Actions%20list

Microsoft

https://support.microsoft.com/en-us/office/make-your-word-documents-accessible-to-people-with-disabilities-d9bf3683-87ac-47ea-b91a-78dcacb3c66d

Watch 10 minute video

https://youtu.be/hnDLS7M59Vw