I used to use version 12.8, and now, when upgrading to 12.11, it looks like the Print to DBMS Output option is no longer available, and without it, in the Anonymous Block Code a "DBMS Output for PL/SQL Table" is not generated.
In 12.8, in the schema Browser, listing packages, when in a package's Body and selecting "Execute Package", in the "Parameters" tab after selecting a Procedure, in the "Output Options" there's a "Print OUT arguments/RETURN values to DBMS Output" and a "Print to DBMS Output (char/number columns only) (strong only)" option to check. 12.11 doesn't have the options.
TOAD versions after 12.8.0.49 no longer create the “Anonymous Block Code” WITH the array output syntax as shown.