MS Teams, prevent people to write in channels

Hi all,

I have a question for my MS Teams organisation.

I created a full flow with Power Automate and a Runbook to generate MS Teams for every project depending on a template.

Now I would like to prevent people to write in a specific channel.

I saw the option "Only owners can post messages" which is corresponding to my needs. 

I wanted to know if it's possible to enable to option automatically for every new Teams created?

With a specific policy or a Powershell command I could add in my script?