SSDI approval depends mainly on if you can do any gainful work.
Think of it this way - What are you able to do, for how long, any lifting/standing/bending limitations. Also education, training , skills factor in.

If these things are not covered in your doctors notes , this is something to talk about & get documented. Also any ADL (activity of daily living) limitations..

The forum sticky threads have great info and helps to clarify how to proceed and what is required for best results when applying for SSDI.