It depends on how their owners protect them. Switching IPs via proxies and changing user agents are well-known and relatively simple methods—essentially pretending to be different clients. However, nowadays, services like Cloudflare often render these techniques obsolete, forcing you to mimic human behavior instead. I don’t have expertise in that area.

You can read any public Telegram feed in your web browser at the URL: t.me/s/CHANNEL_NAME. So far it doesn't look like a problem with scrappe telegram feeds now. Unlike Reddit / X.