Is the feature turned On @megatino
I personally prefer to periodically have my phone check if there is an update and manually Download as I prefer to check out an update before letting my phone download it.
I also don't always get a pop up or update waiting icon in the top status bar of my phone either to be honest.
Current Phone >Samsung Z Fold³ 5G.
Previous Phone > Note 20 Ultra 5G SM-N9860.