If you have been eyeing a 3rd party ROM for your Galaxy A54, you will in for luck as TWRP is now available for your device.
How to install TWRP recovery on your A54.
In Odin Options, uncheck auto-reboot. ODIN download link.
Click on Start and wait for the process to finish
Now hold down the power and volume down buttons until Samsung Galaxy A54 turns off the screen, quickly hold down the power and volume up buttons.
Now in the recovery, you have to do “Format data”
Reboot system and skip initial setup
Connect your Samsung Galaxy A54 to internet
Activate developer options
Enable OEM unlocking and USB debugging so that you can install any 3rd party ROM.
Keep in mind that you will be losing your warranty as soon as you install TWRP on it. However, you can easily get your warranty back by installing stock custom recovery. Just do not tell the Samsung service center that you installed TWRP or 3rd party ROM on your Galaxy A54.
Here is a review of A54 by a popular youtuber.