Hi @Asaf Zilberberg,
These fields can be in project admin > issue screen setting
You can add the values where it has + symbol, and add the fields as required
@Asaf Zilberberg, Here is the documentation you can start with - https://confluence.atlassian.com/adminjiracloud/administering-jira-cloud-products-884344454.html
You can always post questions where you might find the solution
Introducing Jira Cloud for Excel Here at the product integrations team at Atlassian, we are thrilled to announce the new Jira Cloud for Excel add-in! This add-in lets you export Jira data directly ...
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