I checked out the new foldable at CES, and it feels like a wildly practical two-in-one device, thanks to its massive display ...
You'll find the entry for Private DNS near the bottom of the Network & internet window. On Galaxy devices, it will be located in the middle of the More Connection Settings list. If you don't find it, ...
However Samsung kept whittling it down even stripping the slot from the A5,3 series of devices leaving the slot on the A16.