Hi,
You need to give your container a maximum limit of width!
So you can try this:
.container{
max-width: 1400px !important;
}
Please add this to your custom CSS.
Note: Path towards custom CSS:
Extensions>Templates>Styles>
Click on your current default template name then choose Template Options.
Then find custom CSS within the custom code.
https://prnt.sc/pu705g
https://prnt.sc/pu70zn
I hope this helps!
Best Regards