hello I would like to know if it is possible to set network for a telegram group with topics as I have a big network I need to manage with a lot of sites and would like to categories these sights into telegram topics
You have to be more creative with the tool fetch command and use some of the options to do a correct POST. https://help.mikrotik.com/docs/spaces/ROS/pages/8978514/Fetch#Fetch-Sendinginformationtoaremotehost
If you search a little bit of the web you could find some example of this POST with the curl command, and you could translate that to Mikrotik tools fetch command.
Maybe you could ask ChatGPT or Gemini to do that for you.