Sorry, I’ve never used telegram and don’t typically use IRC type stuff because info is lost in the void, and I need time to collect my thoughts. I tried a matrix client around a year ago, but do not recall which one. I don’t use it often enough to have an app. I don’t like anything that keeps a persistent icon on my phone. I don’t even like the Andy WiFi and mobile data visible. IIRC the Matrix client I tried put an icon on my status bar, reduced my battery life substantially, and defaulted to notifications for nonsense.

I might use a matrix client if it were very light weight and didn’t intrude in any way. I would use it like SMS but for the internet. I’m weird though, like completely degoogled, use a whitelist firewall, and only accept messages and notifications of any kind if they are human messages by people in my contacts. I have a dozen FOSS apps total on mobile and do most things in browser… So probably not your best measure of user base, but no comments yet and I think what you’re doing is great.