You might want to look at Steve's Blinds. I learned of the website long ago here on GW and ordered several TDBU cellular shades. Steve's carries several manufacturers' products but we purchased "Steve's own" brand. I believe they are made by a subsidiary of Hunter Douglas but this may be incorrect. We already have several similar blinds in the Hunter Douglas brand and have found the Steve's product to be comparable in quality. Would definitely order from the company again. I am linking the results of a quick search on the website using made-up dimensions and specifying "Steve's own" brand. Please note that there are many other options available on the website, and you will need to carefully enter the particulars for your windows instead of relying on the numbers I used. There is an up-charge for the TDBU feature as well. The website is kind of junky and confusing but you can call and get some customer service assistance. Here is a link that might be useful: Steve's Blinds

Oh, my windows aren't as high as yours so that makes a big difference. Cordless is great but not if it means you'll fall out the window while straining to reach the top. My upstairs room has the BU only feature since the window is higher in that room & the top is unreachable and also I couldn't imagine a situation when I would need the top down. The downstairs room needed the TD/BU, for privacy and light control options, but I can reach the top of the window so it isn't a problem. And if I can reach the top then I'm sure all my guests can also. Wasn't there a recent post about power controlled window coverings for high, hard to reach spaces? It was a beautiful room with sky high windows and a lovely fireplace. Realistically, how often will you have to adjust the top? Frequent changes might make the cost of power control worthwhile. Infrequent might make using a pole, and finding a place to store it, tolerable. Or maybe someone else will have a better solution for you.

You'll find a lot of disagreement among Houzz pros with this idea but what you truly need is white vertical vinyl window blinds for your kitchen window so your pass thru window is fully usable and to give you maximum light/privacy options.

@shirlpp Thanks. That's about all I've come up with as well. Beyond NYT Wirecutter, most "best [anything]" sites that come up on the first few pages of Google seem to be referral link sites written by paid per post writers to get as many Amazon and similar referral links on their site as possible, rather than by expert reviewers sharing testing data or personal experience and insight. Even Wirecutter has been going a bit more so that way since being acquired by NYT. I'm hoping some people with experience with multiple brands will chime in here so we can all befit from the discussion.