Problem with enhancing standard WD ALV

I am enhancing a standard WD Component via Enhancement Implementation.

Standard ALV is bound to a node in the WD Component. I added 2 attributes in that node.

I added 2 new editable columns in the ALV - 1 dropdown and other Checkbox for the new attributes.

I have 2 issues:

1. When I try to set the data to the node, data gets displayed correctly in the ALV. But when I select something in the dropdown, that updated value is not reflected in the node.

2. Also these 2 newly added attributes do not show up in the node in the ALV's controller usage screen for binding.

What should I do here?

Any help is deeply appreciated.

Regards,

Shweta