In Blazor we don't currently have an equivalent to sections in MVC/Razor Pages. We should discuss what if anything we need to handle the relevant scenarios, like enabling a component to add scripts to the bottom of the page.
Hopefully you will be able to resolve this issue #9128 which was closed as "problematic".
...like enabling a component to add scripts to the bottom of the page.
Also applies to adding Bootstrap modals, which to work correctly need to be direct children of the <body> html tag.
Often the @Body of a layout component is nested in a hierarchy of tags below <body>, so including a modal in a Blazor Page (which is desired if the modal contains a form with binding/event hookups to the Page code) prevents it from working correctly.
We're going to provide some of this functionality as part of https://github.com/aspnet/AspNetCore/issues/10450
The rest doesn't seem to be much value-add.