MDE Platform stuck in Version 4.18.24080.9

We currently have Microsoft Defender for Endpoint for our Windows 11 Devices. Upon checking the devices in security portal most of them have "NOT UP TO DATE" PLATFORM.

We tried the following to update the MDE on the clients:

• Get-WindowsUpdate -Install -KBArticleID KB4052623 -> Restart
• Update-MpSignature -> Restart
• Manual update by going to Virus & Threat Protection Settings -> Restart

But we only see update on Security Intelligence. For MDE Platform it is stuck on Version 4.18.24080.9.

What are we missing?