Diono car seats and 3 across advice

I’m due with my 3rd in January. I have a 4 year old forward facing son and 2 year old rear facing daughter. I have a 2022 Honda passport which is like the same thing as a Honda pilot except we don’t have a 3rd row. We need to do 3 across for now until I can upgrade probably by the time my youngest turns 1. Does anyone have these car seats? I’m hoping to get these seats for my oldest two than an infant carrier for the newborn. Does anyone have 3 across? Any advice