If JIRA Plans source of data is JIRA Projects that has Scrum or Kanban Board won't show option to use Story Point field.
If JIRA Plan source of data is Scrum Boards, Story Point field show up
Story points only works with Scrum boards for Jira Projects. I am trying to find the documentation to share but can't seem to right now but I have looked into this in the past. Kanban by definition isn't supposed to work with velocity and in Agile story points are specifically for velocity tracking.
So while some teams do work that way and it works at lower levels of Jira Software, both Advanced Roadmaps and Jira Align from all the research I have done is around Jira being used properly as an agile tool. Properly meaning all teams working the same way, and when teams use scrum they use story points etc.
There are 3rd party tools like Structure for Jira that are better designed to work the way teams prefer rather than the way Atlassian has it designed.