SPA Dashboard - Vertical Menu

Hey!

I am working on SPA Dashboard. I found the Dynamic Offcanvas BS5. But I woul like to have it fixed. When I make a vertical menu, does not stay fixed.

I would like something like this: http://medic-app.type-code.pro/#/vertical/default-dashboard

I found a free dashboard template. but when I copy de code it comes under the CONTENT PAGE.

Any solution?

Thanks