Virtual Queues have all operated the same way with
DAS; guests need to first get a spot in Virtual Queue, the same as all other guests. Once the Boarding Group is called, guests using DAS go to the CM at the
Lightning Lane entrance. DAS and Boarding Group will be verified for the guest, then their group will be directed to the Lightning Lane. Guests can also choose to purchase Individual Lightning Lane if available for the attraction.
WDW DAS website FAQ about Virtual Queue.
Keep in mind that even if you do get approved for DAS, it allows waiting outside of the Standby line. Guests using DAS get a DAS Return Time to come back to the attraction; the DAS Return Time is roughly equal to the current wait time in the Standby line.
When the DAS Return Time comes, guests use the Lightning Lane to enter the attraction. The wait there is shorter than the Standby Line, but could still be 20-30 minutes with nowhere to sit while waiting. On our last trip during a fairly slow time in late October/early November 2022, 20-30 minute waits in the Lightning Land were not uncommon. Using DAS won’t help with standing in the Lightning Lane.
The lines are all accessible to wheelchairs to the point of boarding except for the few which require guests to be ambulatory. Most are also accessible to
ECVs (and those that are not do have attraction wheelchairs that can be borrowed); guests don’t need DAS to use a mobility device in lines or attractions.
The accessible lines and the fact that there can be a fairly long wait without a place to sit is why Disney‘s website says « “A Guest whose disability requires them to use a wheelchair or
scooter does not need DAS.”
Post 1 of this thread about DAS explains how DAS works/what the changes were. Only the first post is up to date; the early pages were from before and right after
Genie+ rolled out. The last pages are further questions and experiences.