(Plasma shell is 5.15.4, KF is 5.57, Artix kernel is 5.0.9)
(Only Artix faces this issue, every other distro with Plasma don’t also face)
Below are my all ACPI info in text mode, nothing wrong,

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[hd_scania@hd-scania ~]$ sudo acpi -V
Battery 0: Unknown, 77%
Battery 0: design capacity 6352 mAh, last full capacity 5300 mAh = 83%
Adapter 0: on-line
Thermal 0: ok, 68.0 degrees C
Thermal 0: trip point 0 switches to mode critical at temperature 99.0 degrees C
Thermal 0: trip point 1 switches to mode passive at temperature 95.0 degrees C
Thermal 1: active, 68.0 degrees C
Thermal 1: trip point 0 switches to mode critical at temperature 99.0 degrees C
Thermal 1: trip point 1 switches to mode passive at temperature 95.0 degrees C
Thermal 1: trip point 2 switches to mode active at temperature 71.0 degrees C
Thermal 1: trip point 3 switches to mode active at temperature 55.0 degrees C
Cooling 0: Processor 0 of 10
Cooling 1: Processor 0 of 10
Cooling 2: LCD 0 of 7
Cooling 3: Fan 0 of 1
Cooling 4: Processor 0 of 10
Cooling 5: Processor 0 of 10
Cooling 6: intel_powerclamp no state information available
Cooling 7: Fan 0 of 1
Cooling 8: x86_pkg_temp no state information available
[hd_scania@hd-scania ~]$

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[hd_scania@hd-scania ~]$ sudo solid-hardware5 query "IS Battery"
QObject::connect: No such signal QDBusAbstractInterface::DeviceAdded(QString)
QObject::connect: No such signal QDBusAbstractInterface::DeviceRemoved(QString)
virtual QStringList Solid::Backends::UPower::UPowerManager::allDevices()  error:  "org.freedesktop.DBus.Error.Spawn.ExecFailed"
[hd_scania@hd-scania ~]$

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[hd_scania@hd-scania ~]$ sudo openrc
 * Running cpupower -c all frequency-set --governor ondemand ...                                                                                                                    [ !! ]
 * ERROR: cpupower failed to start
 * Starting syncthing ...                                                                                                                                                          [ ok ]
[hd_scania@hd-scania ~]$ sudo cpupower -c all frequency-set --governor ondemand
Setting cpu: 0
Error setting new values. Common errors:
- Do you have proper administration rights? (super-user?)
- Is the governor you requested available and modprobed?
- Trying to set an invalid policy?
- Trying to set a specific frequency, but userspace governor is not available, for example because of hardware which cannot be set to a specific frequency or because the userspace governor isn't loaded?                                                                                                                                                                                                                           
[hd_scania@hd-scania ~]$

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[hd_scania@hd-scania ~]$ upower -d

(upower:11396): UPower-WARNING **: 05:24:27.003: Cannot connect to upowerd: Error calling StartServiceByName for org.freedesktop.UPower: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program org.freedesktop.UPower: Permission denied
[hd_scania@hd-scania ~]$

However, closing lid forces to sleep the system, and PowerDevil shows ‘‘no battery’’ to me.