What you’re suggesting sounds a lot like Java’s (and Vanilla Bedrock Minecraft’s) tab button auto-fill feature to me. I could very well be mistaken and this could be the opposite of what you’re suggesting, but I’ll assume you did just that. If I am incorrect in my assumption, please inform me.
Basically, if you try executing a command like /party invite H on Java CubeCraft, and then press tab, you are able to autofill anyone’s name in there starting with the H of who is online at that moment - Just as it works with Vanilla commands on Bedrock (AND Java).
I’m not sure if it is possible to implement such a feature in Bedrock for CubeCraft’s custom commands. If it is possible, it would be great to add just that. Either way, I don’t think this should be considered a high priority feature, even if it gets to be a planned feature eventually. You may ask why, so I’ll give you an explanation. I understand that it is incredibly annoying to have to rewrite your friends’ names every single time, but don’t you start remembering the numbers too eventually?
If it really is an issue, there are a few workarounds too.
@ItsJustWildd explained the best option - to go to your menu and invite them to your party through there. You can also right-click a player in the lobby to invite them or add them as a friend. It’s not as difficult as you make it seem.
It will be very helpful for many people i guess
And they also have to add this for parties.
If you have anything to add to your first post, you should probably edit the post instead of posting several new replies. Just a little heads up!