Samsung Galaxy A33 unlocking bootloader instructions are now available. Just keep in mind that unlocking bootloader will void warranty.
Here are step by step instructions to unlock bootloader on Samsung A33.
Power on your Samsung Galaxy A33
Complete the initial setup
The A33 forces you to connect to the internet before you can use the device
Once you connected to the Internet, a new option will become available in the phone settings > settings > about device > build number > press 7 times on “build number” to enable developer options > settings > system > developer options > enable OEM Unlock and USB Debugging
Power off Samsung Galaxy A33
Boot the Samsung Galaxy A33 in OEM unlocking mode: hold volume-up and volume-down while the Phone is powered-off
While holding the buttons connect the Samsung Galaxy A33 to a computer using a USB cable
Keep holding the buttons untill phone is booted to OEM unlocking mode
In OEM unlocking mode hold the volume up key for few seconds, wait for the phone to complete the unlock process
Your Samsung Galaxy A33 is now OEM unlocked
And that is it. You have unlocked the bootloader of Samsung Galaxy A33. Optionally, you can now root or install TWRP recovery on your A33.