windows 11 update button missing

last week I already have the choice to update to windows 11 in the windows update settings. but I was busy using the laptop at that time so I didn't update it yet. And now suddenly in my windows update, the choice to update to win 11 is missing, I keep clicking check for updates but the result is same, only win 10 updates related. I already restart my laptop for couple times and also troubleshoot my win update but there's no change.