MacBook Pro 2019 16" (MacOS 13.1) + New Sonnet Breakaway Puck RX 5550 XT not working: Please help!

Hi, I just got a new Sonnet Breakaway Puck RX 5550 XT yesterday. I followed all instructions and connected it to my MacBook Pro 2019 16" (MacOS 13.1) via T3. After connecting the Puck turns on with blue light an makes some smooth noise. BUT the egpu is not showing/recognized in my MasOs13.1 MenuBar :( In "Hardware Settings" the Puck is listed in "Tunderbolt" but not in PCI or "Grafic/Displays" (there are only the 2 onboard graphic cards). 

I already changed cables, made a restart, save mode, flashed smc, and so on and so on, including "Troubleshooting eGPUs on macOS" 

What else I can do? Please help

T3 hardware settings:

eGPU Breakaway Puck Radeon RX 5500 XT:

  Herstellername: Sonnet Technologies, Inc.

  Gerätename: eGPU Breakaway Puck Radeon RX 5500 XT

  Modus: Thunderbolt 3

  Geräte-ID: 0x58

  Hersteller-ID: 0x8

  Geräterevision: 0x1

  UID: 0x00080483FC8A0C00

  Routenzeichenfolge: 3

  Firmware-Version: 62.1

  Port (Upstream):

  Status: Gerät angeschlossen

  Verbindungsstatus: 0x2

  Geschwindigkeit: Bis zu 40 Gbit/s x1

  Aktuelle Link-Breite: 0x2

  Firmware Version des Link-Controller: 1.43.0

  Port:

  Status: Kein Gerät angeschlossen

  Verbindungsstatus: 0x7

  Geschwindigkeit: Bis zu 40 Gbit/s x1

  Aktuelle Link-Breite: 0x1

  Firmware Version des Link-Controller: 1.43.0