What does this schematic do, simple MOSFET
Your simulation works fine, the issue comes from the output of the circuit (BAT DP) in which there is no current flow so BAT DP is doomed to stay at the voltage provided by VCC no matter the status of your input (IC DP). But it is difficult to do the right simulation if you don't know how behaves BAT DP on the battery side, if this schematic is important for your project you should really focus on where you can find additional information regarding the battery.
What I suspect is that there should have a current sensing unit on the battery side:

When your input is OFF, the current that can be read through BAT DP is the current that goes through R16 and R17.
When IC DP is ON, the current that can be read through BAT DP is the current that goes through R16 and R17 plus the current that goes through R13 since Q6 is activated.

You can observe this by adding a 1 Ohm resistor between BAT DP and the ground and then by plotting the current that goes through this element.