Sorry, according to the current information, OPPO Find X3 does not support Huawei's 27W wireless charging technology. The OPPO Find X3-compatible wireless charging technology has a maximum power of 50W. To use Huawei's 27W wireless charger for OPPO Find X3, you need to confirm whether the charger supports the wireless charging protocol for OPPO phones. However, due to possible differences in charging protocols between different brands, Huawei's 27W wireless charger may not be able to provide efficient charging effects for OPPO Find X3.
It is recommended that you purchase a wireless charger compatible with OPPO Find X3 to ensure charging efficiency and safety. When purchasing, pay attention to whether the power and charging protocol of the charger match your phone.
You can use them together. But the efficiency will be slow.