SELECT 
  ctime "Date", 
  Decode(
        backup_type, 'L', 'Archive Log', 'D', 
        'Full', 'Incremental'
		) backup_type, 
  bsize "Size GB" 
FROM 
  (
    SELECT 
      Trunc(bp.completion_time) ctime, 
      backup_type, 
      Round( SUM(bp.bytes / 1024 / 1024 /1024 ), 2 ) bsize 
    FROM 
      v$backup_set bs, 
      v$backup_piece bp 
    WHERE 
      bs.set_stamp = bp.set_stamp 
      AND bs.set_count = bp.set_count 
      AND bp.status = 'A' 
    GROUP BY 
      Trunc(bp.completion_time), 
      backup_type
  ) 
ORDER BY   1,  2;

Date     BACKUP_TYPE    Size GB
-------- ----------- ----------
13/04/21 Full            103,16
14/04/21 Full            103,19
15/04/21 Full             103,4
17/04/21 Archive Log        1,5
17/04/21 Full            124,78
18/04/21 Archive Log       1,49
18/04/21 Full            124,85
19/04/21 Archive Log       6,84
19/04/21 Full            125,07