When I create a new workspace I cant add it to a custom module

ERPNext
4

You developer mode is disabled so that is the problem.

You have to enable the developer mode, after then module is appers.

Please apply the command to enabled the developer mode.

bench set-config developer_mode 1

// OR

bench --site [your_sitename] set-config developer_mode 1
How to add new workspace under a module
How can I get my custom app module to show up in Erpnext side bar
Issue with Linking Custom Workspace to Module in Frappe Cloud (ERPNext v15.36.4)
How to add custom report link or doctype link in Workspace?