Two Jira instances and two diffrent UX/UI experiences

Question

I have two different jira instances in the same organization and I see that this instance has different UX experiences.
For example, one of them has the ability to add a column on the issue grid, and the second does not.
How can I check if the UX version is "newer" and how can I enable the exact same UX for both instances?
There are many other minor differences and it's quite annoying.

k.kawalec · Answer

Yes, I checked it first. As I wrote "on full page width result is the same"

Matthias Gaiser _K15t_ · Answer

That might be a dumb suggestion, but have you tried to scroll right in your first Jira 1 screenshot and then you'll see the column selection?

k.kawalec · Answer

Jira 1: Missing icon for selecting column (on full page width result is the same)

Jira 2:

Jira 1: Top left view, item details from filter list "all issues"

Jira 2: Top left view, item details from filter list "all issues"