If the mobile phone wireless charging receiver is slow to charge, you can try the following solutions.
First, make sure there are no obstacles between the charger and the phone to ensure smooth current transmission.
Second, check that the phone and charger are aligned correctly to make sure they fit perfectly together.
In addition, check whether the power of the charger and the power adapter match, if not, replace the appropriate charger. You can also try restarting the phone, sometimes software issues can affect the charging speed. Finally, if the above methods still do not work, you may need to replace with a new charger or receiver to get a faster charging speed.