The motor question is essentially a key action.
The US/Israel do not want to deliver, because this would promote Turkey's independence even more. They do not want to strengthen Turkey. However, they are in a dilemma because they are in a bind.
The US also does not want Turkey to manufacture its own technologies, but this path is already so irreversible that it cannot be reversed.
At present, Turkey is 83-85% independent in terms of armaments.
The US/Israel knows that any pressure will only accelerate the program further.
They also do not want Turkey to obtain technology from China, because Turkey would get 100% of it, including technology transfer, even in space, hypersonic technologies, and semiconductors.
This is a nightmare for the US/Israel because they are aware that they are in a quandary. They are playing for time, saying neither yes nor no to the F-16, F-110 engine, and F-35, and are delaying and waiting for a favorable opportunity to exert pressure.
Turkey deliberately keeps bringing up this issue to exert pressure; they want to push for a decision, as with the S-400 deal.
This is because Turkey is well aware of the strategic maneuvering of the US/Israel and is continuing to push for technological independence, obtaining technology transfers from the EU (Spain, Italy), the UK, South Korea, Indonesia, Malaysia and Pakistan (actually China).
Turkey has deliberately established cooperation with southern European countries, which are also under US influence, but not nearly as much as western European countries. Furthermore, the Israeli lobby has no influence in Spain and Italy, and there is little to no diaspora in South Europe and South Korea.
