Could The Drivers Seat Back Be Modified To Go Further Forward?

I’ve been travelling in my gen 3 for a while and always sleep in the back. I’m 6’2” and i fit, but it’s a bit tight. It would be great if i could get the drivers seat back to go further forward like a coupe’s front seat does.

I’m in Australia so my Prius is right wheel drive. The wider section of the rear backrest is on the drivers side so that’s the side i sleep on.

Is this possible and if it was would it create a safety issue that was illegal.