Interesting, my output is showing both Monterey 12.01 and Monterey 12.1 both as Full Installer.
Not knowing what " Cleaner " is installed - can not offer any direction and what this " Cleaner " may or may not have inflicted on this computer
Below is predicated on this computer is Non Part of a Mobile Digital Management Service . Otherwise all actions below will probably fail.
Factor as play
1 - Like poor Wifi connection
2 - Slow wifi connection
3 - Too many other people downloading at the same time and Apple Severs are overloaded
4 - Software on the computer interfering with the download process including AntiVirus Software
5 - Running behind a VPN which may increase Packet losses, may corrupt or otherwise interfering with the Search for UpGrade to Monterey
6 - If via wifi too many Other devices using the wifi at the same time reducing the Bandwidth to your computer.
7 - Best Results are via Ethernet Cable to Router
There are several ways to download the Monterey macOS 12.
1 - Connect to Router via Ethernet connection and restart the computer in Safe Mode and then open the Apple Apps Store and get the Full Installer of Monterey. It will be the most recent version and once downloaded run the installer from the Applications folder.
2 - This method may seem unnecessary but sometimes the Router Restart clears Network issues from ISP to Apple Servers
Shutdown Router. Shutdown computer and disconnect all External Drives. Restart Router.
Connect to Router via Ethernet Cable.
If via Wifi - Disconnect all other Devices using the Wifi - want the Maximum Bandwidth only for this computer.
Restart computer in Safe Mode. It does a Repair Disk, Clear System Cache files and only load Apple Software, extensions and Fonts. Will load slowly - Normal.
Once Logged in - open Apple Apps Store and Get the Full Version of Monterey. It will take some time and several pauses will occur - normal. Countdown clock may say 15 minutes but in Real time may be 30 minutes. Same goes for clock at 10 minutes could be 20 minutes in Real time. Eventually , Full Installer will download and a New Application in Applications Folder will present called Install Monterey.
Stop there and perform a Time Machine Backup. If desired - have an External Drive - Copy & Paste the Install Big Sur Application to external drive for future usage - making a Bootable Installer. Now run the Installer.
Have found this method more reliable than the Software Update which is very iffy at best