If a page must know who is asking, it cannot be baked ahead of time.

A static route is rendered once, at build, and served to everyone. Reading anything that belongs to a specific request, such as cookies, headers or the query string, forces rendering per request. Settings that add a timer, a loading boundary or a list of parameters still produce the same output for every visitor, so they do not make a route dynamic.

Read it once, then a question tests whether the trick stuck.