I don't have the names of the departments in question, but I know that, during the first wave, Public Services and Procurement Canada, or PSPC, approached the largest federal tenants, those occupying a large share of the office space. To date, very few of them have signed an office space reduction agreement. They cited their mandate, the space required and concerns about the possibility of increased demand for in-person work. They didn't want to reduce their office space in case they ran out. Furthermore, in my opinion, there wasn't enough of a financial incentive for them to undertake that reduction.
Consequently, I believe PSPC needs to take a more global and directive approach in this regard to ensure greater progress.