How to extract module federation runtime core

[shunxing]

Hi, my goal is to implement a behaviour like dynamic remotes import. However, federation runtime init, loadRemote, registerRemote will only happen when my host is loaded, this will be already too "late". I would like to have the fastest render of my remote as possible as my remote components could be amongst the first thing to be displayed on the page.
Therefore, I would like to prevent too much delay for the first contentful paint of my remote components.
I'm looking for a way to load my remoteEntry as soon as possible. I set a script tag in my webserver HTML response such as :

<script src="/path/to/remoteEntry.js"></script>

However, when downloading and executing the downloaded remoteEntry, I ended up with an error Uncaught TypeError: Cannot read properties of undefined (reading 'setGlobalFederationConstructor')

I understand that it's because the global window._FEDERATION_RUNTIME_CORE is not initialized yet, therefore the thrown error. That being explained, can module federation core be initialized outside of host ?