Are you referring to JIRA server or Cloud?
If server, please which version and I would be happy to help have a look.
If cloud and the image is already attached, click on the image(upload file or image icon in the comment menu) as shown below:
Select the file you want to attach and it should be added.
If you are having problems, can you take a screenshot of what you see when you attempt to upload a file or a screenshot of your comment section.
If I misunderstood your problem, do help clarify this and I would try to answer.
Hi, Jira users! Do you use Jira alongside Microsoft Teams? We want to hear how you’ve used the power of Jira Cloud and Microsoft Teams (via the Jira Cloud for Microsoft Teams app) to achieve a team...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events