You need to add story point field on the create screen of the epic and story issue types.
Read more about adding fields to screen here:
Or use where is my field link in the create screen to see the exact reason
Also, while create issues. On the create issue popup on the top right, there is an option of "Configure fields" when you click on "configure fields" then you can click on the link "Where is my field?" and then type the field name - "Story points" in this case and JIRA will also tell you exactly why the field is not appearing on the create screen.
@Jack Graves [AC] first caught our eye with his incredible breakdown of what, in his opinion, can make or break a Jira software implementation. (Read his thoughts on this thread)! In this follow...
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