Intel Wifi 6 ax200 adapter not working with Ubuntu 20.04

I'm sorry, i am new to ubuntu i tried what was recommendet in the other threads regarding this problem, but i didn't get it to work. Because I'm a little bit of a noob i just dumb what I know untill yet:

• In the options menu under Wlan is displayed "No adapter found"
• The WLAN controller is embedded in the mainboard
• The ethernet port I'm using is working and rated at 1GBit but show in the options only at a 100 MBit
• I turned off Secure Boot.
• No dual boot
• The Bios is updated
• Bluetooth is also working

Here is some Info:

Mainboard: MAG X570 TOMAHAWK WIFI (MS-7C84)

Ubuntu version: 20.04

Kernel: 5.13.0-27-generic

modinfo iwlwifi | grep iwlwifi-cc
firmware:       iwlwifi-cc-a0-63.ucode

sudo dmesg | grep iwlwifi | grep version

[    2.775830] iwlwifi 0000:28:00.0: loaded firmware version 63.c04f3485.0 cc-a0-63.ucode op_mode iwlmvm

 sudo dmesg | grep iwl:

[    2.772250] iwlwifi 0000:28:00.0: enabling device (0000 -> 0002)
[    2.775613] iwlwifi 0000:28:00.0: api flags index 2 larger than supported by driver
[    2.775627] iwlwifi 0000:28:00.0: TLV_FW_FSEQ_VERSION: FSEQ Version: 89.3.35.37
[    2.775830] iwlwifi 0000:28:00.0: loaded firmware version 63.c04f3485.0 cc-a0-63.ucode op_mode iwlmvm
[    2.808262] iwlwifi 0000:28:00.0: Detected Intel(R) Wi-Fi 6 AX200 160MHz, REV=0x340

sudo lshw -C network

  *-network                 
       Beschreibung: Ethernet interface
       Produkt: RTL8125 2.5GbE Controller
       Hersteller: Realtek Semiconductor Co., Ltd.
       Physische ID: 0
       Bus-Informationen: pci@0000:26:00.0
       Logischer Name: enp38s0
       Version: 04
       Seriennummer: d8:bb:c1:10:07:38
       Größe: 100Mbit/s
       Kapazität: 1Gbit/s
       Breite: 64 bits
       Takt: 33MHz
       Fähigkeiten: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       Konfiguration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.13.0-27-generic duplex=full firmware=rtl8125b-2_0.0.2 07/13/20 ip=192.168.178.66 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       Ressourcen: irq:24 ioport:f000(Größe=256) memory:fc700000-fc70ffff memory:fc710000-fc713fff
  *-network
       Beschreibung: Network controller
       Produkt: Wi-Fi 6 AX200
       Hersteller: Intel Corporation
       Physische ID: 0
       Bus-Informationen: pci@0000:28:00.0
       Version: 1a
       Breite: 64 bits
       Takt: 33MHz
       Fähigkeiten: pm msi pciexpress msix bus_master cap_list
       Konfiguration: driver=iwlwifi latency=0
       Ressourcen: irq:39 memory:fc600000-fc603fff

lsmod | grep iw

iwlmvm                421888  0
mac80211             1028096  1 iwlmvm
iwlwifi               372736  1 iwlmvm
cfg80211              888832  3 iwlmvm,iwlwifi,mac80211

lspci -knn | grep Net; rfkill list:
28:00.0 Network controller [0280]: Intel Corporation Wi-Fi 6 AX200 [8086:2723] (rev 1a)
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no