I'm not familiar with that specific program you refer to. Certainly in my discussions with the Ministry of Defence in relation to that transition piece, that's not been raised as a specific issue or problem for them. The vast majority of those leaving will have homes to go back to.
The issue, where it is raised or where I have come across it, is in relation to those who have already left the armed forces, who would have had a home, but then subsequently lost it, possibly because of mental health problems, possibly because of drinking or other behaviour problems, and who would have become homeless a short while or sometime after leaving the services.
I'm not familiar with any programs to provide specific housing for those who are leaving the services per se.