Step 2: Set a Trigger to Activate When an Issue is Created in Jira Software
First, configure Jira Software.
Click the Jira Software icon "【Copy】Register an Issue in GitHub when an Issue is Created in Jira Software"
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Click "When an Issue is Created"
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Change the trigger action to "When an Issue is Created or Updated"
By doing this, an Issue will be created in GitHub not only when it's created but also every time it's updated. Convenient!
※ If you leave it as "When an Issue is Created", a new Issue will not be created in GitHub every time you update an issue in Jira Software.
The title of the app trigger was also made the same as the trigger action.
You might want to keep the title similar to the image as it will be needed later.

Press Next and enter the subdomain.
The subdomain is in the Jira Software URL, so you can copy and paste it.
※ The trigger can be set to activate at intervals of 5, 10, 15, 30, or 60 minutes. Please note that the shortest activation interval varies depending on the plan. A shorter setting is generally recommended.

Enter the project key for Jira Software.
The project key differs for each project created, so create the project you want to reflect in GitHub!
Checking the project key in Jira Software is easy!

Press the project at the top of the Jira Software page and click to display all projects
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Copy the key next to the project name
If there are other projects you want to reflect in GitHub, it will be easier if you keep track of the keys!

Once you have entered the subdomain and project key, press the test button just below.
It will be displayed in blue as "Test Successful", so save it!
In my case, the test did not succeed here, so I converted the token again...
Step 3: Set an Action to Create an Issue in GitHub
Next is the GitHub configuration.
Click the GitHub icon "Create Issue" from Yoom's My Project
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Set the title as you like, and this time I chose "Create Issue" as the action! Press Next
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Enter the owner name and repository name.
There are details in the red frame, so you can copy and paste that part!

The title should be fine as it is.
The comment is probably initially entered as "Issue Details", which means the content of the issue created in Jira Software will be fully added to GitHub.
When you click in the comment input field, something called "Output" will be displayed, so click "When an Issue is Created or Updated"
The name here depends on the title of the Jira Software flow bot created initially, so if you have changed it, it will differ from this display, so please be careful.

In addition to details, I wanted to display "Issue Type", "Creation Date", "Priority", etc., in GitHub, so I added them as shown in the image.
By doing this, the details of the Jira Software project will be fully reflected in GitHub as well. Wonderful!
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Once the selection is complete, press the test button.
【Project Created in Jira Software】

【Checking if it is Reflected...!】

【Oh...!! It's Done!!!】

That's all! Thank you for your hard work!