Multisite is not forcing SSL url slug on new sites.

Hi, i have problem. When a new user signs up with new site, the wordpress slug that you see when publishing a new page is still http:
Here is the image

I dont't understand why are new users with sites not created with SSL?

I don't want to use https://wordpress.org/plugins/wordpress-https/ plugin just for that. And I'm not even sure it would fix it.

Is there a way to fix this with some code snippet?

I did change all http's to https in db manually but still new user pages show http when writing new post.

Thanks