Previously we had the ability to edit jira properties on our customers
(this is an old screen those from the previous GUI)

We were using this to a custom value to our customers so we would know if they were a designated contact.
In one of the recent updates this functionality has either dissappeared or moved and I can't find it anymore. Is it gone? Or just hidden somewhere new?
This question is for the current version of Jira Cloud. We've been using the hidden properties for a couple years, but haven't added users in a while. So this could have dissappeared any time in the last year.
Thanks!