There are 2 models on the front derailleur extension of the bike
The 11 Speed Bike Front Derailleur Extender is suitable for 10 and 11 speeds, and can only be used to lower the height.
The 12 speed bike front derailleur extender is suitable for 12 speeds, and is compatible with 10 and 11 speeds, which can be raised, lowered.
Buy what you need, thank you!

11 Speed Bicycle Front Derailleur Extender
Fits: Shimano DURA-ACE R9100, ULTEGRA R8000, 105 R7000
10s/11s Road Bike Front Derailleur (Not Fit 12s) Not Fit Mountain Bike
Function: Reduce the height of the front derailleur to achieve the use of small tooth chainrings on the road bike
Material: High Strength Aluminum 7075-T651, Boeing and Bombardier. Provides maximum rigidity and durability
Material:
Extender: AL7075
Screw: 304
Lower Distance: 15.5mm
Weight: 4g

12 Speed Bicycle Front Derailleur Extender
Fits: 12s Di2 Shimano Dura-Ace R9250 R9200/ Ultegra R8150, R8170, R8100/ 105 R7150, R7100/ FORCE AXS
Compatible with 10s, 11s road bikes, not for mountain bikes
Function: Raise and lower the front derailleur height to achieve the use of large or small tooth chainrings on the road bike.
Raise and lower distance: 15.5mm
Material: 304
Weight: 9g