Why are automatic reservation from PM orders not visible in transaction MMBE?

Hi experts,

Why are automatic reservation from PM orders/IW31/,create with movement type 261 not visible in transaction MMBE?

With MB25 we list all open reservation for material, but in MMBE not.

It is a question of customizing or a note should be loaded?

Thank you very much for your time.

Regards

Plamen Kirilov