Status change across Kanban and Scrum Board for same user story

[Jira user]

I have 2 boards now

1. Kanban board - used for BA

2. Scrum Board - used for development team

Kanban board have different swim lanes and additional workflow settings

Kanban board swim lanes - ready for groom, merge, UAT, acceptance

Kanban board workflow settings column - ready for definition, swag, request expedite

Scrum board have different swim lanes - Ready For Dev, Dev in progress, ready for UAT, done

Here is the process I wanted to implement

1.BA will create user story in Kanban board which will go through it own status and workflow

2. In the scrum board, I have added the filter and status mapping which will return the Kanban board user stories in scrum board

I am facing below Issue

1. If I move the user story status from "Ready for dev" to "dev in progress' in scrum board, it is not allowing me to do. Because dev in progress status is not present in kanban board. Is it possible to handle this case?

Note: In case If they change status in kanban board, it is reflecting back in scrum board. I have handled that by mapping the kanban board status in scrum board

[Nic Brough -Adaptavist-]

This is very confused to me, why are you using swimlanes for what look like status?

However, I can partly answer.  Boards are not containers for issues or status.  They are a visualisation of a set of selected issues, with columns representing groups of status (often only one status), which you map into the columns in the board config.  

If a status is not mapped into a column, then you won't see any issues on the board in that status, and you can't drop things into that status.

To put it another way:   There is no "create on kanban board and go through own workflow".  You create an issue, it goes through the issue's workflow, and your Kanban and Scrum boards select for it, and then display it in columns determined by the status mapping.