You can close this.

I’m not asking of Enfold Contact Form. That validation is easy.
I need to make the phone number mandatory on the store’s form (WooCommerce). The setting used to be in the Customize menu, but with the new block checkout, the modification is done directly on the Checkout page. However, here’s the problem: the theme (?) forces the Checkout page to use the classic editor. How can I make the phone number field mandatory here?

Thank you! Now it works!

This is solved: the video was wbem-format. When I changed it to mp4, it is seen also on mobile. The wbem worked only on large screens

Once more :)

Thanks! Problem solved.

It works! There were a cache problem first.
How could I get the font bigger?

But the problem appears when I update the WooCommerce. That’s why there is now the old version.

Thank you! Now this works.
It’s great that I always get help from here!

Thank you! It works.

I disabled all the plugins one at the time and noticed that Rank Math SEO -caused the problem; when it was off, the testimonial slider worked normally. And today they updated the plugin. Now this works fine.

Solved! You can close/remove this.

I disabled some plugins and contacted the webhotel. I have no idea how the get this better….

Thank you! Now it works great.
– I try to learn this by myself but sometimes it is not easy… :D