Fn key brightness Lenovo v14

Hi my laptop config

cpu:
                       Intel(R) Core(TM) i3-1005G1 CPU @ 1.20GHz, 1200 MHz
                       Intel(R) Core(TM) i3-1005G1 CPU @ 1.20GHz, 2956 MHz
                       Intel(R) Core(TM) i3-1005G1 CPU @ 1.20GHz, 1200 MHz
                       Intel(R) Core(TM) i3-1005G1 CPU @ 1.20GHz, 1200 MHz
keyboard:
  /dev/input/event4    GreenAsia 2.4G RX
  /dev/input/event3    AT Translated Set 2 keyboard
mouse:
  /dev/input/mice      GreenAsia 2.4G RX
  /dev/input/mice      Synaptics TM3336-004
monitor:
                       AUO LCD Monitor
graphics card:
                       Intel Iris Plus Graphics G1 (Ice Lake)
sound:
                       Intel Ice Lake-LP Smart Sound Technology Audio Controller
storage:
                       Intel Ice Lake-LP SATA Controller [AHCI mode]
                       Samsung Electronics NVMe SSD Controller SM981/PM981/PM983
network:
  wlp1s0               Realtek RTL8822CE 802.11ac PCIe Wireless Network Adapter
network interface:
  tun0                 Network Interface
  wlp1s0               Ethernet network interface
  lo                   Loopback network interface
disk:
  /dev/nvme0n1         Samsung Electronics NVMe SSD Controller SM981/PM981/PM983
  /dev/sda             TOSHIBA MQ04ABF1
partition:
  /dev/nvme0n1p1       Partition
  /dev/nvme0n1p2       Partition
  /dev/nvme0n1p3       Partition
  /dev/nvme0n1p4       Partition
  /dev/nvme0n1p5       Partition
  /dev/nvme0n1p6       Partition
  /dev/sda1            Partition
  /dev/sda2            Partition
usb controller:
                       Intel Ice Lake-LP USB 3.1 xHCI Host Controller
bios:
                       BIOS
bridge:
                       Intel Ice Lake-LP LPC Controller
                       Intel Host bridge
                       Intel PCI bridge
                       Intel Ice Lake-LP PCI Express Root Port #9
hub:
                       Linux Foundation 2.0 root hub
                       Linux Foundation 3.0 root hub
memory:
                       Main Memory
bluetooth:
                       Realtek Bluetooth Radio
unknown:
                       FPU
                       DMA controller
                       PIC
                       Keyboard controller
                       Intel Ice Lake-LP Serial IO I2C Controller #1
                       Intel Signal processing controller
                       Intel Ice Lake-LP Management Engine
                       Intel Ice Lake-LP SPI Controller
                       Intel Ice Lake-LP Serial IO I2C Controller #0
                       Intel Ice Lake-LP DRAM Controller
                       Intel Ice Lake-LP SMBus Controller
                       Chicony Electronics Integrated Camera

Fn brightness key won’t work. How can i fix it?

Not the same laptop, but the brightness control on my Lenovo Legion 5 was fixed when upgrading the kernel from 5.15 to 5.16.