Not sure why you need this however I'm afraid it's not possible in the markup. For sure you can find the relevant HTML element using JavaScript and attach desired event programmatically - use your browser dev tools to find what you are looking for.
So Blazor seems to need a more time to setup before subscribing to the events.
Is there a better event rather than document 'ready' for me to set up the subscriptions so I can avoid having the 10s delay?