Hello Micronik_PS
Regarding your question, in order for a RecastNavMesh to be generated for each Agent, the values of AgentRadius or AgentHeight or AgentStepHeight must be different.
From the image, I think that the values are the same, which is why it was not generated.
Please check UNavigationSystemV1::RegisterNavData and FNavAgentProperties::IsEquivalent for more information.
Note that if you change only AgentStepHeight, it may be recognized as the same information if one of them is -1.
This is all the information I have, sorry if it is wrong.