Refrigerator storage, convenience, and organization, are all about contiguous shelf space, not total volume. French doors are all superior in that for the refrigerator section, which is 70-80% of use. You can fit a sheet cake, pizza box, and giant box of meal subscriptions into a French door, and you cannot in a standard 36” side by side.

The freezer organization is where many French doors can fall down a bit, even though it’s volume can hold a full sized turkey and lots of frozen vegetables.  But finding one with multiple pull out drawers or inserts can mitigate that. As can using the freezer drawer for only immediate needs, like ice cream! And then using a separate upright freezer to augment your longer term frozen storage. That’s my tactic, as the pandemic food instability took my habit of bulk buying for budget’s sake to the extreme. Good luck!

Your alcove should be 72” high, as that has been the standard in kitchen design for decades. Take a look at your cabinet above for a detachable filler that can be removed, as that was often done to be able to close it in a bit more for a shorter model.

This will not be a successful kitchen design. There are multiple issues. The clearances will not work. I’d suggest working with a Kitchen Designer who is familiar with the 31Rules of Kitchen Design, cabinet specifications, building codes, and appliance clearance issues.