Is it possible to do the O Auth authentication within an iframe of an React application without opening a new tab. when using an iframe, Atlassian refused to connect due to same origin policy and when I tried to add an domain to the allow list, the "configure URL allowlist" was no where to be found. (I have global admin permissions, link to the configuring the allow list below).
https://confluence.atlassian.com/adminjiraserver/configuring-the-allowlist-1014667309.html