Issue resolved. This switch is not updated via the web page. Helpep by Easy Smart. It would then be possible not to invest a stupid and confusing guide to firmware through a webcam with firmware. And...

On the off site Link to page there is a fresh update numbered TL-SG105PE(UN) _V1_1.0.0 Build 20230218. And how can I actually update it from the previous firmware if I see the following in the update...

Tested ONLY on Orangepizero2_3.0.4_ubuntu_jammy_server_linux5.16.17 firmware based Ubuntu for Orange Pi Zero 2. Most likely for other firmware versions based on Ubuntu, including other Orange Pi...