Hello KP,
I suppose the screen you show is the one coming from the query itself. Therefore it shows only the field that have been configured as "avaiable for queries" within the infoset.
Go to t-Code SQ02, select the infoset you use for that specific query, and click on the change button
the screen is spread in two part. Look for the Infotype 1001 in the left part, select any other field you want and drag and dropped in one of the Field Group/Data field folders (the right side part of the screen).
Don't forget to save and generate the infoset when you finish, afterward you will be able to use these new field from your query.
If an infotype is not availabel on the left side. go to the Edit menu while you edit the infoset and select the "change Info-Type seelction. A popup should appear and let you tick the box relevant to anyother infotype you would like to use.
best regards
Hadrien