Is it possible to Add Sub Operations and Sub Resource to Work Orders

Summary: Client are requesting if it is possible to add a sub operations and sub Resources to the different operations in a work order

Content (required): Client are requesting if it is possible to add a sub operations and sub Resources to the different operations in a work order. e.g for operations line 10 is it possible to have another sub operation defined under line 10 just like this case scenario 10 we can decide to have line 10a, line 10b, line 10c etc ....Please see screenshot below

Version (include the version you are using, if applicable): 23C

Code Snippet (add any code snippets that support your topic, if applicable):