If you can't find a SideDrawer from the front-end web application that you used to have access to, it may be that you have lost Collaboration status. This can occur if you are NOT an Owner of a SideDrawer.
To regain the Collaborator role, perform the following steps:
Step 1 - From the Console, click on SideDrawers
Step 2 - Find the SideDrawer, and click on the 3 dots under Actions.
Step 3 - Click on Collaborate with this SideDrawer
You should now have access to the SideDrawer from the front-end app.