Battery charging slowly on linux | Huawei Matebook X Pro (laptop)

Three months ago, I bought a Huawei MateBook X pro 2021. I directly installed linux on it, never used W. Right now, I'm using Kubuntu with kfce which seems to be lighter than Ubuntu and gnome. I've installed TLP to improve my battery life (It can get up to 4-5 hours) while web browsing and using the terminal. Tbh, I'm quite fine with that, but the real problem is that: **When I use my laptop, it takes many hours to get the laptop charged. I would say around 5 hours to get 80% of the battery charged. And when I watch twitch, or use heavier apps, it get stuck at the same % of battery.** *Does anyone has any hint to improve the situation?* You have diverse info below:

Specification of my battery:
upower -i /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          BAT0
  vendor:               Sunwoda-
  model:                AP16L5J
  serial:               ####
  power supply:         yes
  updated:              sam. 13 août 2022 23:01:27 (52 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               charging
    warning-level:       none
    energy:              19,1764 Wh
    energy-empty:        0 Wh
    energy-full:         54,4656 Wh
    energy-full-design:  55,2372 Wh
    energy-rate:         11,4829 W
    voltage:             7,777 V
    charge-cycles:       28
    time to full:        3,1 hours
    percentage:          35%
    capacity:            98,603%
    technology:          lithium-ion
    icon-name:          'battery-good-charging-symbolic'
  History (charge):
    1660424487  35,000  charging

Specification of my laptop:

Intel Core i5-1135G7

Mesa Intel Xe Graphics