iPad Pro Safari different Layout

Hi,

I have been using an iPad Air for the last couple of years.
Now I have purchased a stunning new iPad Pro.

However, I am irritated that several websites look so different now.

One of my favourite websites, Wellness Heaven, looks really different on the iPad Pro, as the layout is changed. I just checked with my old iPad Air, there it looks normal. The same happens with several other websites, such as the news website WELT.

How can I get the old design / layout back, displayed as before on my old iPad? Is there an option to adapt the layout on the iPad Pro to old screen sizes?

Thanks, Nina