It has been stated previously by Mojang that feature parity is important and that if players find a feature that does not have parity, it should be reported as a bug using the bug tracker.

Especially on realms, it is VERY important the realm OPs be provided with the necessary commands to perform basic functions. This includes commands such as /kick and /ban as well as ability to customize permissions for players on the realm and monitor activity.

I understand that the dev team is working on a replacement for previously removed player permission customization feature as well as player monitor activity, however, NOTHING has been mentioned about why parity has not been developed for primary realm/server commands.

Could we get some feedback from the bug tracking team as to why this is the case? In the case of commands like /kick and /ban, these have been part of Java multiplayer worlds since the alpha days. These really need to be added. Otherwise, it is impossible to kick players from a Bedrock realm without the OP actually uninviting them from the realm. Sometimes the OP just needs to kick them as they are AFKing while others need to sleep (or for any other temporary reason). Likewise, a comprehensive ban feature needs to also exist within Bedrock realms.

Reference Link: Commands and supported platforms.
https://minecraft.gamepedia.com/Commands#List_of_commands