Atlassian Senior Frontend Engineer interview questions

The interview went really very well but the process is too long means it took around 2 months. The point of contact HR had helped me a lot in understanding the steps of the interviews and I m really grateful to her. She tried her best. At first need to go through the Karat.io technical round. On passing that, had a date of interview where I had two round 1) Browser Coding Round where the interviewer asked to design a form or search bar like that and after that 2) Javascript Round , where interviewer gave a code snippet and with the help of promise/async -await approach how to handle api calls . Then HR informed that my browser coding round was not much impressive but my Javascript round was promising enough to carry on to the next rounds. Next round was System design round where on excalibri I had to draw and design system (to create a JIRA ticketing system having To-Do , In Progress, Deployed etc columns) . I was then informed about the last two rounds that was Value and Ethics and Managerial Round. So those rounds were very simple. But unfortunately I was not selected since my browser coding round was weak and my notice period being 3 months ( I did a biggest mistake of saying that it cant be negotiated at the beginning of my interview sessions)