Probably for a number of reasons:
1 - Because nobody's added them.
2 - Because there is no 'one' delta that can be used as the go-to model
3 - The wiki isnt generally all that up to date - there's a huge amount of invalid/old content. Best guess is that nobody'd had time to do it yet.
Ideally there needs to be a delta hub page, listing the models and their differences. Again, time is a problem though. A lot of the main pages are locked down as well so its not possible to update some sections.
1 - Because nobody's added them.
2 - Because there is no 'one' delta that can be used as the go-to model
3 - The wiki isnt generally all that up to date - there's a huge amount of invalid/old content. Best guess is that nobody'd had time to do it yet.
Ideally there needs to be a delta hub page, listing the models and their differences. Again, time is a problem though. A lot of the main pages are locked down as well so its not possible to update some sections.