telegram has different visibility based on which client you are using and your phone number’s region. I’ve seen it firsthand how some channels are not available on telegram downloaded from app store vs direct apk download. unless if you mean in spirit they’re basically the same which i agree but everyone that has used telegram at all knows that telegram values being accessible more than free speech and privacy.
by available i meant available. it’s on a per channel/group basis and not on individual messages but essentially you can’t join or view their messages even if you have their id and even if someone forwards it to you it displays a “this message is nor available on clients downloaded from google play” error message or something similar. if you joined a channel prior and it get blocked from your client you stay in but can’t view its messages.