When you install robot 23.4.5 on Windows Server 2025 the controller detects Windows server 2012 instead.
This is visible in the controller GUI and OC inventory
Known issue with robot 23.4.6 and earlier
The issue is being resolved in DX UIM 23.4 CU7.
To resolve the issue upgrade the 23.4.5 or 23.4.6 robot to 23.4.7.
Download DX UIM 23.4 CU7:
UIM Server 23.4 - Cumulative Update 7
Operator Console 23.4 - Cumulative Update 7