Yes, he says: If the Prophet ﷺ is mentioned.

By the tongue of the Friday khutbah speaker, should we send prayers upon him? There is a difference of opinion among the scholars, and the most apparent view, and Allah knows best, is yes, you do send prayers upon him, but you do so quietly to yourself.

Meaning, you do not say it out loud: "O Allah, send prayers upon.." Rather, you say to yourself: "O Allah, send prayers and peace," like this, so that even the person next to you does not hear you.

In a very low voice, okay.