That doesnt seem to work either however I can get crash reports how I showed you previously through the files.
My f3 debug folder doesn't actually seem to exist, I followed the instructions and no debug notifications appeared or the link to the folder. I only know that you get this because I asked my friend to do it on their minecraft and it worked fine. Could this be the cause of the lag? It only shows what in my minecraft or was previously when I used to mod my game. I also attached an image of my chat settings so you might be able to see if I have anything there to stop me seeing the notification.
There's been no crash report for 1.17 and separating the launchers somehow made it worse?