This poc code effectively displays dependant picklist along with a control picklist in a table using LWC. This should be used as a sample code, not plug & play solution.
- tableComponent : Table component to build the html table which will store the actual data set This component invokes the child tableRow component to represent each row in a table with dynamic picklists
- tableRow : tablerow component represents a row in a table with 2 comboboxes which are dependant in nature. example - Country-> State This component is independant of the object & field api names to be used.