I don't think you can have read-only members in a telegram group.
On 15 Nov 2020, August Abolins said the following...
I don't see a mute user option. Are you using a special bot
to manage a group or users?
Don't remember if I mentioned it in my message from the TG side a few minutes ago but I am currently using the Miss Rose bot in my BBS group.
https://missrose.org/guide/
-=>Richard Miles<=-
-=>Captain Obvious<=-
-=>bbs.shadowscope.com<=-
| Sysop: | Coz |
|---|---|
| Location: | Anoka, MN |
| Users: | 2 |
| Nodes: | 4 (0 / 4) |
| Uptime: | 119:20:03 |
| Calls: | 361 |
| Files: | 6,349 |
| Messages: | 234,082 |