Make sure you have:-
Expanded the text
Make the text clearer, more tutorial, and more thoughtful
Add more examples and intuitions to help the reader
Add new experiments/theorems/significance tests to leave no stone unturned
Consider counterarguments, variations, and alternative explanations
Give enough details to allow a reader to replicate the work or apply it in new settings
Contextualize the ideas
Open the thesis with a page or two that sells the work to a general audience
Mention all obviously related work and explain how it relates to yours
Discuss alternative solutions that you rejected or are leaving to future work
Point out connections to other areas, including other possible applications of your ideas
Describe possible generalizations (and try them if possible)
Lay out future work for yourself or others