i working on an extension to use myself – that i intend to inject into the Twitter/X
and got to a weird situation that i can’t overpass.

  chrome.tabs.onUpdated.addListener(async (tabID,tabStatus) => {
   
   if(tabStatus.status === "complete")// && loaded == false)
   {
     console.log("tabStatus.status: " + tabStatus.status);
     console.log("tabStatus.loaded: " + loaded);

     let tabProps = await getTabProperties(tabID); 
     if(tabProps.url.startsWith(twitterUrl))
     {
    
        chrome.scripting.executeScript({
         injectImmediately: false,
         target : {tabId : tabID},
         args: [1],
         //runAt:"document_end",
         func : injectedFunction,
       });

    

async function injectedFunction(a) {
    document.querySelectorAll(`[role="tab"]`)

that document query selector doesn’t return nothing – I can understand that at the moment the script is run the doom is not loaded yet.
i try to use a delay – and that did the trick but not always (!) but it doesn’t seems the right way.
is there any way for me to understand when the document is fully loaded?