Check whether the mobile phone supports the single-charge mode. If yes, you can adjust the mode in the mobile phone Settings.
If not, you need to replace the charger that supports the dual charge function.
In addition, you can also try to use a more compatible charging cable or check whether the charging port is damaged.
You can enter the Settings - more Settings - dual engine fast charge Settings, if still not available, you can try to \"Settings -> More Settings -> Restore factory Settings -> Restore all Settings \"used again