So I live in the US and I have seen a few videos proclaiming the virtues of Dutch style bikes including NoJustBike's video. They all are saying that these bikes cannot be found in the US but couldn't one just buy a step through frame and just add the missing features themselves such as a chain guard and parallel handle bars?
The closest production bike available in the US similar to omafiets would be the beach cruiser. They're available as a single-speed with/without coaster brakes, or internally geared, have wide handle bars, step-through or stylish but still easy mounting frame, and often have color-matched basket and rack options.
Careful with what you wish for. Omafiets and cruisers work where there aren't significant hills. Heavy single speeds really suck when you're faces with even a moderate 4% grade. Practical urban bikes in the US really need some gearing.
PUBLIC offers some nice internally geared city bikes and beach cruisers. Their 8i series is their top end. It's steel, has a 8-speed internal geared hub, fenders included, and with handles set for upright riding. Their optional rack looks like it pairs well with the frame. 8i series drive train gearing is something on the order of 28 to 86 gear inches. The cheaper 7i series is approximately 33 to 82 gear inches. Both are quite reasonable for city gearing with the 8i being easier for going up hills and an extra gear for better cadence matching.
Trek makes a beautiful city bike: the District 4 Equipped and has a step through version. Dynamo hub for always on lighting and the rack is included. Capable gearing at approximately 30 to 92 gear inches. IMHO, the best part is a Gates CDX carbon belt drive. Belt drives are even lower maintenance than a traditional bike chain. Never lube a chain again, battle with rust or road gunk, or become sad mid-ride with sand, mud, or ice fouling.
Speaking of belt drives, Priority specializes in them and has a big selection of commuting and recreational bikes. They even have a folding bike, which can be nice if you're stuck needing to drive or take a bus for one leg of a trip.
Handsome makes frames and will build a bike to your spec. For example, you can spec their mixte bike ("She Devil") with a Shimano Alfine 8-speed. Sellers like these are a great option, but I recommend finding a LBS willing to take a shipment and do final assembly work on it. Shipping completed bikes is expensive and you'll still need tune-ups now and then.
I'm sure there's more out there, but that's enough shopping for me today. Who else has thoughts? Or perhaps other neat finds?
I mean while some of the models have some of the features of Dutch Bikes, none of them have all or even most so they would still need to be customized.