You stated that Unreal Engine 5.6 has been officially updated and that inZOI is updating accordingly, so you are conducting verification for the 5.4 → 5.6 version upgrade.
However, the latest version of Unreal Engine is 5.7. Why aren’t you updating the engine to the latest version?
I assume they’re not upgrading to 5.7 yet, because either the game or UE aren’t very stable in that combination. Are there any major improvements compared to 5.6 that inZOI could benefit from? 
@asgm021862 , That’s a good question.
Any reasonably large software, such as this game, is an integration of several libraries and many third party components (often dozens and dozens), along with self developed code. While the Engine is a core component, there are dependencies on several sub-systems to work together, especially in a large multi-platform game as this one.
Update to any component of such an integrated software is always considered and executed with great care and caution, weighing investment
— (time, effort, cost, tech and human resources, integration with other systems and components of the software, legal systems licenses copyrights, third party systems integration, impact on existing deployed user base, alignment with existing release cycle, distribution mechanics, cost time and effort to reverse in case of failures, impact or loss of existing functionality that could be replaced by new because of the component update, impact on currently planned roadmap, availability of support for [from] the [third party] component being updated etc. )
versus return on the investment
— (performance benefits, stability, lower maintenance in future, smoother integration, third party linkages, lower costs, benefits and positive alignment with vision and purpose of the software etc).
When updating a core component such as the Engine of the game, the risks are higher. In fact it is rare that a large integrated software will move to the latest version of a core component unless it is a necessity, and that too after several alpha and beta tests. In this ever changing tech world, all those dozens of third party sub-systems are continuously getting updated at different times, and this game or any such software has to keep balancing these changes and still ensure stability and performance. Very often you are chasing moving targets.
So as @HeinziDerHeld said, the Inzoi team would have considered the above and chose to upgrade to UE5.6 for now.
A lot of things are happening behind the scenes even with small hotfixes and patches. And in this ever changing tech world, end users and players keep saying ‘Make a change! I wan’t this now because that other game has it so’ 
That is a very short and simplified version of the process. Hope it helps answer your question.
Hello sorry to bother you
I’ve done the new updates but my modkit is still on 5.4 what can I do
Upgrade to UE 5.6 to the main branch of the game is planned in first half of April. Most likely, Modkit will be updated then as well.