Need help with html embed in google sites

Hi, I am looking for help regarding an HTML embed in my google sites. I am trying to make it look good on phone but i can't seem to get it to work and I have tried a lot of different things.
First image is on desktop which looks nice albeit a bit small
Second image is on my phone where i always have to scroll no matter how long the embed is
Is there a way to change that ? It has to specifically work on google sites