Photo didn’t come up. Try again, please.

Not sure what the dilemma is but you can mount a mirror from the ceiling.

Cool bath!

I like your designer's suggestion-if you prefer more streamlined style

Or: if you're into vintage..one can find these French oval/arched mirrors..that can be hung on chains they come with. They are usually detailed a bit, either wavy edges, or interesting frames..

Of course it'd be more ..vulnerable than a mirror that's firmly attached to the wall. Or ceiling.

I love ceiling mounted mirrors but I'm afraid smth with rods and all will overwhelm your space too much, in your case..the window is smaller, and is really lovely..I'd try to obscure it less, and go with shape of a mirror that contradicts it a bit, is softer...