There was a proposal for this and even a desktop pr, but currently there is no core API to get all replies to a message, so you would need to iterate/load all messages of a chat, which would be super slow (because it would need to be done for every message), so we need to build in support for it: Show Reply Count in Message Metadata
Another idea was to have an inbox at some point when we have mentions similar to Discord (like you can get notified for replies and mentions across chats even when you muted the chat, maybe).
Then there is the idea of a thread view similar to Telegram: Threads in Group Chats - #10 by Simon
Or see the Thread Proposal in general: Threads in Group Chats