This group cant be displayed because it was used to spread android

To fix the “this channel cannot be displayed on Telegram” error, you need to enable the “Disable filtering” option. This filter is a sensitive content filter. By default, the “Disable filtering” option is enabled on the Telegram mobile app.

After you've “Enabled filtering”, force-close the Telegram app on your phone and re-open it. Next, try to join the channel that has the “This channel can't be displayed” error again. Now, you should be able to join and view it without getting an error on both iPhone and Android devices.

There are two options for disabling filters on Telegram. The first option involves using the “Nicegram bot” for iOS and Android. With the bot, you will bypass the filters on your Telegram account. Alternatively, you can install the desktop Telegram app or access it via the browser.