Samsung Galaxy A33 can now be rooted, but now you must unlock bootloader, install TWRP and install Lineage OS before you can root it.
Installing TWRP Recovery on Samsung A33
After unlocking bootloader, complete again the initial setup of the phone.
Enable Developer Options and USB Debugging.
Once connected to the internet, OEM unlocking can be activated.
settings > about device > build number > press 7 times on “build number” to enable developer options
settings > system > developer options > enable USB Debugging (and OEM Unlock if you see it)
Power off the phone
On your computer download the following: Samsung USB Driver, Odin, TWRP Recovery, vbmeta_disabled_uh.tar
https://developer.samsung.com/android-usb-driver
https://dl2018.sammobile.com/Odin.zip
https://eu.dl.twrp.me/a33x/twrp-3.7.0_12-0-a33x.img.tar
https://xdaforums.com/attachments/vbmeta_disabled_uh-tar.5941179/
Install the Samsung USB Drivers on your computer
Boot the phone in OEM unlocking mode: hold volume-up and volume-down while the Phone is powered-off
While holding the buttons connect the phone to a computer using a USB cable, press volume-up to continue to Download Mode
On the computer extract the odin.zip file and start Odin
In Odin klick on AP and select the file you downloaded, twrp-a33x.img.tar
In Odin klick on BL and select the file you downloaded, vbmeta_disabled_uh.tar
Klick start to flash TWRP Recovery on your A33 Phone
When you see a green “PASS” in Odin it means the process is done
Power off the phone
Installing LineageOS on Galaxy A33
Download LineageOS for A33 on your computer.
Extract the downloaded LineageOS.xz to get the LineageOS.img file
Copy the “LineageOS.img” on any Micro-SD-Card or USB-Drive (you will need either a microsd adapter or usb adapter)
Connect your phone with the storage where the LineageOS.img is stored (Your microSD-Card or USB-Drive)
Boot phone in Recovery-Mode (TWRP) hold volume up + power and use cable to connect to pc while holding buttons
In TWRP select install then press select storage, select SD Card or USB where the lineage.img is located
Choose install image and flash the LineageOS_GSI.img to System
In TWRP reboot to system
Done, you have successfully installed lineageos
Rooting Samsung Galaxy A33
Download Magisk from here and rename the file from Magisk.apk to Magisk.zip
Copy the renamed Magisk.zip and rename the copy to uninstall.zip
Copy both Magisk.zip and uninstall.zip to your SD-Card or USB-Drive
Boot the phone in recovery mode (TWRP).
In TWRP select install, select storage, select Magisk.zip and flash it
Reboot to system
Now your phone is rooted, perced to install the termux app, open it and enter the command su
Magik will ask to allow superuser privileges for termux, confirm and enter the following commands:
settings put global captive_portal_mode 0
settings put global ntp_server pool.ntp.org
Finally reboot your phone for the changes to take effect
If you wish to unroot your phone, boot to recovery (TWRP), install, select uninstall.zip and flash it, reboot, done.