Hi @debino1,
We are using bootstrap boxed width layouts, actually those pages are full width, we have a pre-defined highest width of the page say 1140px, so not the full width from browser end to end is not possible, you can create a feature request about that, if more users request our developers will include that feature.
You can request it here: https://colorlibsupport.com/t/shapely-feature-requests/
Let us know,
Thanks,
laranz.