Which is why I think export orders are unlikely. All the customers are sovereign nations, and don't owe anything or benefit from the UK building them. There are cheaper yards for these options.
Do you want to pay pommy yard prices, or order something from S.Korea, Japan, Vietnam, Indonesia, Singapore, Eastern European yard prices. Australia and Canada will also have yard capable of doing work, and Australia has added advantage of location and being the regional power and Canada has done some recent work.
So yeh, I don't know if the UK will get any of its exports. Indonesia, Singapore and Brazil seem intent on building anything locally anyway. The mid east order always seem to evaporate when dealing with navy stuff. I wouldn't bet on it.
South Korea also has some competing designs, as does Japan that would probably suit NZ down to the ground. I would imagine as soon as you started talking to Korea they would sell you a
Chungmugong Yi Sun-sin-class destroyer - Wikipedia or
Daegu-class frigate - Wikipedia for a price you couldn't refuse.
The type 26 was so successful because Australia and Canada wanted big, low man power, long range, flexible, platforms. No one else really was offering that.