I've found a couple but are there alternatives I've missed? This one looks like it only comes in one size so maybe too small for my 178cm.
https://nixeycles.com.au/Site/product/keeka/
There is one Lekker that fits the brief. They say there is a men's edition but I also only see one size. They call it the Jordaan Women. Sheesh. Says Height Range
160cm-195cm. Maybe upright bike frames can fit a wide height range.
https://www.lekkerbikes.com.au/product/jordaan-womens-3-spee…
It's only for trundling about town. Not many hills. Not worried about weight or brake type.
Isn't a step through frame largely intended for dresses/skirts, so they don't get caught up on the top bar? Certainly why a number of my female friends have bought this style of frame and why I'd imagine it is advertised at women.