Fill in the entire corner with a corner cabinet.

whether it is functional or not. the look should be unified.

The small base cabinet you have looks awkward too. What is the tall cabinet on the left? A Pantry? It's kinda hard to advise without seeing more of the whole room.

Why is the tall cabinet not flush with the wall cabinet on the right? They look like two different depths?

I would take out the base...and maybe if sizes are right, lower that wall cabinet to be a shallow base. Take out the tall end panel....and run the countertop back in to that niche. Then do corner shelves.

Here's a kitchen I did...not the same as yours, but might give you some ideas.

Plain & Fancy Cabinetry - Oakwood Ohio · More Info

Ps. Just noticed the oven cabinet doesn't have a left end panel? That's very odd...obviously local custom built cabinets, right? Why would they make it "blind" like that. Not really understanding how/why that's like that. I see a stub of something in that blind area...maybe that's why? Steam oven plumbing?

That lack of end panel will cause issue if you want corner shelves. They'll need to rebuild your oven cabinet so it's structurally sound with a left end panel.

Thank you for the great advice!! The cabinet co. has agreed to cover the costs of changing that corner to a normal functional corner cabinet or reconfigure it to accommodate the floating shelves. (They at first tried to make us cover the cost to fix that mess 🤦🏼‍♀️)

Who designed this mess? Whoever did that foots the bill IMO