[Bluestrom13]

Does anyone know if this is a possibility?

Burgman 400 Rear shock adjustment

Forgive me if this is already posted somewhere, it might help noobs, "The real setting" is visible through the left side "leg shield". It's hard to see, easier to see the "bottom number" and convert to actual setting.

www.burgmanusa.com

Mines set at number 3 now that I ride (mostly) solo, and I find that suits me.
Try position 1.

 

[Bluestrom13]

DO any of you guys get the feeling that the seat is slightly pitched forward a bit

Well I don't.
And this side view says it doesn't.

On a personal note.....What do you weigh-in at?

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(That picture you posted is a 2018 or later bike, different bodywork and seat),

 

[Bluestrom13]

Can it not be achieved by fitting Dog Bones ?

It could ......

However, the "dogbones" (links) are not individual items, but a fabricated assembly (Item 12 below). Could be cut and shut with side plates welded onto the existing links?
Extreme care would be required to maintain alignment of the mounting holes.
The result would mean less clearance between the rear wheel and the trunk base. Not much there as standard, on full bump, so.....

I think the result, if it did improve OP's comfort, will detract from the scoot's handling.