How to add a custom button on Jira UI in Users and Role section of every project?

As highlighted in the attached screenshot, I want to add a custom button in Users and Role section of all the existing projects in my Jira instance UI in between "Add users to a role" and "Users or groups" in the pop up that appears on clicking "Add users to a role button". How can I achieve this functionality?Can anyone please guide me on is there any possible ways to modify the UI?

Thanks & regards,Preethi H R