Ok, I see. Telegram tries to combine Discord, WhatsApp and WeChat, but it isn't a great replacement for either of them.
Discord has groups, chanels, threaded conversations, allows you to mute people, great support for bots, folders, etc. Signal is much better for private chats though, it has a very secure encryption protocol and enables E2EE by default and is very focused on privacy in general. Btw Signal also allows scheduling messages. I tried Telegram for both groups/chanels and private chats and I found it really annoying to have my groups and channels in the same app as my normal conversations. Just use Signal and Discord/Matrix/Revolt.