In addition to the people who spent their years in turbine pressure dynamics and cooling systems, the average 15 generals who are preparing for doctorate in the USA at the master's level and the shipyard workers cannot be read. You can get help in ship design from many countries and companies, but not even a finger can pass on turbine engines.
Same applies for shipbuilding as well, it is much more than the shell of the warship and welding-assembling some blocks. We are talking about 30+ years experience on shipbuilding before starting the Ada-Class.
There are certain things you can get help from abroad, for some there is not; everybody shares block-building know-how nowadays, or cutting and welding of simple marine grade steels, but none shares know-how of RF interference designs, low-RCS design (most is obvious in basic level but implementation requires past experience, and it could be devastating as well, i have seen some foreign countries trying to employ low-RCS design but then ending up with worse RCS), sonar-dome design,placement and production, construction with HY, non-magnetic, and special armor grade steels. Or they do something and just ship the results without any interim explanation, they come individually to weld and build the blocks of special sections in case of ToT.
It does not involve a rocket-science but it does involve experience and knowledge which is as much as ,or even more than a jet-turbine, Ukraine again as a great example, they can make jet-engines but not a ship (despite of having a heritance of both from soviets), not even something mentionable, corruption does not explain this but for jet turbine you need heritance and a factory and some people, but for a ship you need a whole team at least a hundred specialist to come together.
So again it is Turkey which is going to teach them how to build blocks, as well as sub-system integration at once while British will just let them to build easy blocks, deliver complicated blocks pre-assembled and keep their hand off during integration of subsystems.
The people who;
does mass-management of Ada class had 20+ years of experience,
does piping plan of Ada-Class had 10+ years experience plus some know-how training abroad
does steel-construction plan had experience of 20+ years plus some know-how and training abroad
does shock analysis had PhD abroad + 10 years experience
and there are at least a few dozen individual people i can list for certain aspects of design either had a PhD abroad, or had a long experience + know-how transfer via other joint projects so that we did become able to make Ada class.
We were also offered some empty shell (design) to equip it on our own but we have declined a few offers from abroad.