Honestly, both games should actually happen together, as para atlhetes are as much as the olympic ones. Treating the Paras as a dessert after the main meal is kinda disrespectful given the purpose of them.
Anyway, back on topic; IPC letting Russia and Belarus being neutrals for realsies makes sense when the games is that close to start, that could be in the exceptions of the IOC recommendations. Some atlhetes of these two might already be in Beijing, so it's better let them be. BUT, in another case of the IPC doing things better than the IOC, after the games they will convene with their members to discuss about punishment for Olympic Truce violations and even about suspending or EXPELLING Russia and Belarus. That might be interesting to see unfold...