@Alexey Zherikov - I believe that you need to kick-off the process by first opening a board and opening the Jira Cards app from the left vertical collaboration tools, and then “Authorize” the app:

If that is the flow, there is definitely room for improvement.

No.

We are talking about Jira server

And you giving flow for jira cloud.

Here is steps for integration for jira server

https://help.miro.com/hc/en-us/articles/360019501754

And i can not see these fields. 

i see nothing when i click on app

I am taking about the Jira Cards app: https://miro.com/marketplace/jira/

Is this the app you are trying to set up?

Yes

And i am trying to set it up by this instruction https://help.miro.com/hc/en-us/articles/360019501754

for jira server/data center

And your answer above “opening a board and opening the Jira Cards app from the left vertical collaboration tools, and then “Authorize” the app” works only for jira cloud, since it redirects to such form where you can only choose cloud jira site

@Alexey Zherikov - Yep, it appears I missed the word “server”.

After looking at a few of my accounts, I see the Jira fields on one in a Consultant Plan, but not in my spouse’s Education Plan. And, when I look at other apps, there are options/fields missing there, too, e.g., the ability to delete apps. 

If you haven’t already, I would suggest opening a support ticket by following these instructions:

https://help.miro.com/hc/en-us/articles/360020185799-How-to-contact-Miro-Support#h_01F010RXA0E1S9C0WFQYX75R6C

Here is a post from a little over two months ago where Miro made a change to allow anyone on a Free or Starter Plan to be able to install apps, and they pushed out some default apps to all of these plans:

https://community.miro.com/ask-the-community-45/resolved-remove-jira-cards-app-integration-12035

During this change, they broke the ability for users to delete apps (the delete button was missing). Perhaps they have touched (and broke) the same code.

@Alexey Zherikov - In case you weren’t aware, another user has reported that the Jira Cards app has been fixed - you can now switch to and configure for a Jira Server instance: