Hello there @narendraparmar,

You can use a query like this one:

{
  boards(ids: 1234567890) {
    items_page(limit: 10) {
      cursor
      items {
        id
        name
        created_at
        updated_at
        state
        group {
          title
          deleted
        }
        column_values {
          ...on BoardRelationValue{
            linked_items{
              id
              name
            }
          }
          column {
            id
            title
          }
          text
          value
        }
        subitems {
          id
          name
          created_at
          updated_at
          column_values {
            column {
              id
              title
            }
            text
          }
        }
      }
    }
  }
}

I hope that helps 😁

Cheers,
Matias

thanks your idea worked

here is working one :

{
boards(ids: 12345) {
items_page(limit: 10) {
cursor
items {
id
name
created_at
updated_at
state
group {
title
deleted
}
column_values {
…on BoardRelationValue{
linked_items{
id
name
}
display_value
}
…on MirrorValue {
id
text
display_value
}
column {
id
title
}
text
value
}
subitems {
id
name
created_at
updated_at
column_values {
column {
id
title
}
text
}
}
}
}
}
}

I am glad that is the case @narendraparmar !!!