Plugged power but pending-charge anyway ASUS ROG 20.04.3 LTS

I alwais have a not charging icon in the top bar. This is the output of upower -d when laptop is plugged in:

Device: /org/freedesktop/UPower/devices/line_power_AC0
  native-path:          AC0
  power supply:         yes
  updated:              mar 16 nov 2021 20:44:16 (90 seconds ago)
  has history:          no
  has statistics:       no
  line-power
    warning-level:       none
    online:              yes
    icon-name:          'ac-adapter-symbolic'

Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          BAT0
  vendor:               ASUSTeK
  model:                ASUS Battery
  power supply:         yes
  updated:              mar 16 nov 2021 20:44:16 (90 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               pending-charge
    warning-level:       none
    energy:              57,252 Wh
    energy-empty:        0 Wh
    energy-full:         58,741 Wh
    energy-full-design:  66 Wh
    energy-rate:         0 W
    voltage:             15,677 V
    percentage:          97%
    capacity:            89,0015%
    technology:          lithium-ion
    icon-name:          'battery-full-charging-symbolic'
  History (charge):
    1637091856  0,000   unknown
  History (rate):
    1637091856  0,000   unknown

Device: /org/freedesktop/UPower/devices/DisplayDevice
  power supply:         yes
  updated:              mar 16 nov 2021 20:44:16 (90 seconds ago)
  has history:          no
  has statistics:       no
  battery
    present:             yes
    state:               pending-charge
    warning-level:       none
    energy:              57,252 Wh
    energy-full:         58,741 Wh
    energy-rate:         0 W
    percentage:          97%
    icon-name:          'battery-full-charging-symbolic'

Daemon:
  daemon-version:  0.99.11
  on-battery:      no
  lid-is-closed:   no
  lid-is-present:  yes
  critical-action: HybridSleep

Meanwhile the laptop seems is not discharging, always on 97%

if you are here because you are afraid of "my charger is not working!" and your battery level is "low", then relax, just give it few minuets and it shows "charging". Let's leave technical discussion behind ... :-D

The pending-charge state means AC power is on but the battery is not being charged. This can happen because its charge is above a certain threshold, to avoid short charging cycles and prolong the battery's life, or because the PSU is not powerful enough to charge the batteries.