Many moderators do not notify their users of the reasons for their removal from groups. This is undesirable behavior because users who break the rules don't receive any notification that they've been removed from the group in the first place. Second, they don't know what exactly they did wrong. And they are very likely not to draw conclusions, and will continue to do wrong, annoying other users.
Previously, other suggestions about blocking explanations were published here, which you may also be interested in:
"Allow giving a ban/restriction reason in groups or channels" Jan 25, 2021 https://bugs.telegram.org/c/1109
"Add an option to see reasons of bans and accounts limits" Jul 7, 2021 https://bugs.telegram.org/c/7178