Found another PID for this from a Hyundai Creta which might work:
| Name: | Brake Position |
| ShortName: | Brake |
| ModeAndPID: | 0x2201a0 |
| Equation: | {y:0} |
| Min Value: | 0 |
| Max Value: | 1 |
| Units: | |
| Header: | 7E1 |
| Scale: | 1 |
Another one from that Korean Torque Pro plugin is:
| Name: | Brakes Location |
| ShortName: | Brake2 |
| ModeAndPID: | 0x220104 |
| Equation: | |
| Min Value: | |
| Max Value: | |
| Units: | |
| Header: | 7D1 |
| Scale: | 1 |
Not sure about the equation for this one but it's looking at the "R" token for data and mapping it based on custom logic
These didn't work on my Elantra but might be worth giving them a try for your model