Openhab3: Valeduto does not send channels by mqtt

Setup, Configuration and Use Beginners
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  • Platform information:
    • Hardware: AMD64, J4205 (Pentium), 6GB, SSD (1TB)
    • OS: LXD, ubuntu 20
    • Java Runtime Environment: n.a.
    • openHAB version: 3

I followed this tutorial, which tells me in step 6 to Create Equipment from Thing. This does give me the message:

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There is not channel automatically added by the item. All steps befored worked for me.
I do not know how to manually configure the specific channels. In the tutorial, they add the channels in step 7 and from what I understand, they should be there automatically. Here is the rest of my configuration:

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UID: mqtt:homeassistant_rockrobo:a4e0d49a09:rockrobo
label: rockrobo (vacuum)
thingTypeUID: mqtt:homeassistant_rockrobo
configuration:
  topics:
    - vacuum/valetudo_rockrobo
  basetopic: homeassistant
bridgeUID: mqtt:broker:a4e0d49a09
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MQTT Explorer gives me:

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