how to add attributes in levels and attributes planning analytics outside the LOV

Hi experts,

we have requirement to have attributes showing in material plan (showing every item based on the same attributes) hence using the advance filters in selector tool.

The attributes in item/product hub are not showing in the LOV levels and attributes planning analytics.

Are the attributes limited ? (we cannot use attribute outside planning analytics) or is there a way to add them ?

This is the extended question to this post :

How can I add filters for members in planning table? — Cloud Customer Connect