I don’t understand what you mean about the neutral and ground bonded in the generator. The generator has a ground terminal on the frame with nut and screw on it. It’s also GFCI. Can you explain that detail?
From front page of manual.
The ground goes to frame. So the two are bonded toghter.
If you use this with a transfer switch to a grounded / bonded panel you would un-bond from the frame.
On page 2
GROUNDING THE GENERATOR
If this generator will be used only with cord and plug-connected equipment,
National Electric Code does not require that the unit be grounded. However, other
methods of using the generator may require grounding to reduce the risk of shock
or electrocution. Consult a qualified electrician, electrical inspector, or local agency
having jurisdiction for local codes or ordinances to find out if grounding is needed
in your situation before using the generator.
When grounding is required, the nut and ground terminal on the frame are used
to connect the generator to a suitable ground source. The ground path should be
made with #8 size wire. Connect the terminal of the ground wire between the lock
washer and the nut, and tighten the nut fully. Connect the other end of the wire
securely to a suitable ground source that is in contact with the soil for a minimum
distance of 8 ft.
Good luck with storm be safe.