Beautiful, it’s a bit frustrating that it’s a step and has outlets in it. Are you supposed to sit there looking out? Feels a bit pet shop-ish. Since the view is of the neighbors garage, I would do sheers which let in light but give you a bit of privacy. And replace tha fan light with something better.

Remove the platform, there is no function unless you are putting on mini stage plays or string concerts! When completed have a window covering business come in to show you options that will take into account direction (N, S, E, W) of light and new function of the space. If you cannot remove the platform, lots of plants will help obscure the view from outside.

Landscaping out front, front fence (?) will make the windows purposeful.

Turn your window into a greenhouse! Cut-to-fit wood-look tile planks (to catch drips) that match your wood flooring then gorgeous tall and medium plants in the bay and at least one "framing" the window! This "greenhouse" window would dress both sides of your windows. Add soft roman shades as shown.

I like the bench/console behind the sofa idea.

I can’t remove the platform as it is part of the window. I think we have decided to build it into a window seat

Seems very low for a window seat.
I like the idea of having the couch there. But maybe post more pics and information on your furniture needs for more layout opinions.

I agree with other posters - the raised floor in front of the window seems pointless and makes that floor space almost unusable. If it can be removed would suggest doing just that.