Scott is still on IR is what Dubas said
so he's cleared to practice and not to play, like Marner.
also there's the weird IR issues where the Leafs placed people on IR but the games were postponed so technically even if they are ready they didn't stay out the games expected (this is more specific to marner, but he's also not ready due to not being able to do any work because the Leafs suspended their work)
so there's some funky things the Leafs/other teams and the NHL need to work out to make those actions work as they were intended before everything got thrown into the fire