How to concatenate variable and collection to string to use with label - Power Apps person field

I have a person field (Multiple selection).

When a user click and select a dropdown I need to do a lookup to grab the multi users from the person field and display them concatenated in a string.

On the onChange item in the dropdown I'm doing the below:

Set(
    varApprovers,
    LookUp(
        Group,
        ID = DataCardValue3_1.Selected.Id
    ).Approvers
);
ClearCollect(colOrderDistro,LookUp(
        Group,
        ID = DataCardValue3_1.Selected.Id
    ).Approvers);

I can see the collection and the variable table. But stuck on how to display the results in a string like so:

John Doe;Charles Dickson

Tried using this Concat(varApprovers,Value, ";").

But no luck. Thanks in Advance.