@mazpt, yes of course. Here are a few more pictures showing how kitchen, living and dining, and outdoor deck and bbq area flow together. Oska kitchen is really neat in detailing; wood grain on the doors for example, are matched across as many doors as long as a 2.4m sheet allow. Floor turned out very nice too. Light natural colour, wide and long boards, laid length way all the way from front door to the back makes the space looks a bit bigger. Although it is still a floating floor, there are minimal floor movement that make squeak sound, most of the floor are feels solid. I hope that floor squeaking noise will settle over time.

Perhaps, not strictly canopy style would work better. Qasair can do custom design, if there is not thing that would fit your need already on the market.

can it go through the wall to outside?

If there isn't a duct leading somewhere it's not ducted. Venting into the cavity doesn't sound right? Perhaps it was permissible when originally built? Our first house had a simple exhaust fan, of the type also used in bathrooms, above the stove and it went straight into the ceiling. That wasn't unusual in cheaper homes in those days. But these days kitchen exhausts should be recirculating or ducted externally to avoid build-up of potentially dangerous residues. In your situation recirculating sounds the most straightforward option. Alternatively you might be able to run the ducting out a side wall but the longer the ducting the less efficiently it works. Is it possible your rangehood has been installed incorrectly? We installed a rangehood in the 90's which could be configured as recirculating or as ducted and It took a few attempts to get the thing working properly.