This is why whenever you try to do anything significant on a web site with a phone, they tell you to "Download our app". Detection is very good now. Slack can see right through desktop mode, cheater, and will redirect you to the app regardless.
Never had that issue on Vanadium browser, or Brave or even Firefox. I personally refuse to download an app if there is a website for the same. For a long time I was even using door dash in browser.
I get the sarcasm, but it's like comparing apples to oranges. Calling a number and talking to people is vastly different to clicking some buttons on your phone. App/website have almost same user interface, just different ways to get to that interface. Calling the number is totally different interface.
