Is it possible to add a new issue tracker system to the JIRA built-in importers ?

[Osm test]

We want to add our new issue tracker system to JIRA built-in importers. Is it possible? If yes, please let us know how to achieve it?

https://confluence.atlassian.com/adminjiracloud/migrating-from-other-issue-trackers-884344525.html

Here we found that JIRA no longer supports third party importers.

https://developer.atlassian.com/jiradev/jira-platform/guides/other/tutorial-writing-custom-importer-using-jira-importers-plugin

But again we have a tutorial for writing a custom importer. Is this different from adding a new issue tracker system to built-in importers? If it is different, what is it for?

We are totally confused with these.

Can anyone please clarify my question and about these tutorials.

[Nic Brough -Adaptavist-]

An importer is a block of code that can read and understand a data source (file, database connection, etc) and convert the incoming data into JIRA data.

These data sources are almost always other issue trackers of some form.

To add a new importer, a new add-on is required to implement the read-source-write-JIRA process.  So "a new issue tracker importer" is just "an importer"

On Cloud, you cannot add add-ons of this type.  You could write a Connect add-on that runs elsewhere to read your data and poke it into JIRA over REST though.

For Server JIRA, your tutorial link is the starting point.