As a JSM administrator, you have two options to access Modify My Request project configuration:
from the main Jira menu:
Go to the Jira Service Management project you want to configure Modify My Request for → Select Project settings → Scroll down and select Modify My Request
Go to tab → Select project to configure → Select Jira Service Management project you want to configure Modify My Request for → Click Go to project
Modify My Request: Project configuration
→ Select project to configure
→ Select project
→ Go to project to configure it