[Blazor] Multiple layout per page or Custom access check solution

[mikermnv]

I need to use my own layout component on a page, derived from LayoutComponentBase, to perform access checks. The idea was to create something similar to the Authorize attribute, but one that accepts my context and required permissions, and the check itself would simply call my SecurityManager.HasAccess. If access is denied, it would render an AccessDenied component; otherwise, it would render the Body.

The problem is that the page already uses a specific layout responsible for the overall page structure, and I cannot remove it. Because of that, I cannot apply my own layout through layout attribute. The way with inheritance also doesn't work. Moreover, the option using a separate wrapper component is not a very beautiful option.

Question:
What is the correct way to implement this kind of access check when the page already uses a layout?