Answered by Shaykh Faraz Rabbani
Do we raise our hands during the dua in the khutbah?
Answer:

Walaikum assalam wa rahmatullah,
No, one doesn’t raise hands for supplication during the khutba nor raise one’s voice when saying “Ameen.” Rather, one says it quielty, to oneself. [Ibn Nujaym, al-Bahr al-Ra’iq]
And Allah alone gives success.
Faraz Rabbani
