AEM Page/Tool in Remote SPA

Hi Team,

We are working on AEM remote spa project where AEM is used only to send Content to external React app.

Now we need to create a tool/page/dashboard in AEM scope which will be showing list of pages/components and some other information.

But Problem in SPA framework is AEM does not allow to write rendering script (HTML/JSP), even though if we write it and try to use on page, there is no way to do so.

Is there any way we can still create a page in same site tree by passing SPA framework ?

OR

We should try to create page/tool under etc folder? if yes, is there any recommended approach?