I did a search and this was the closest I could find: https://www.airwaysim.com/forum/index.php/topic,44068.msg240845.html
The feature request is to expand the statistics page/company score to include 4 new stat categories:
- Current Aircraft Fleet Size (small)
- Current Aircraft Fleet Size (medium)
- Current Aircraft Fleet Size (large)
- Current Aircraft Fleet Size (very large)
Right now if you want to know who the largest "small aircraft" airline is, you have to do considerable digging as there is no idea to figure out who the large "small" airlines are. Likewise for very large etc.
Part 2 would be expanding the alliance display pages to not just show total fleet size, but also showing the breakdown by aircraft size.