Click on the available firmware release build displayed on the right panel.
Ultimate Guide to Sony SOV33 Lock Removal: Flashing FTF Firmware Sony Xperia X Performance (SOV33) sony sov33 lock remove ftf top
If you can tell me the and whether the phone is hardlocked (e.g., 0 attempts left), I can tell you if the FTF method will work for your network lock. Xperia Permanent Network Unlock - Sony Xperia X Performance Click on the available firmware release build displayed