Hello,
Unfortunately, this is currently a limitation of the default Combo Box in the React client. By default, the dropdown options are shown as soon as the user clicks or focuses on the field, and there isn’t a built-in setting to only display options after typing.
I also tried looking into AutoCompleteForMendix, but since your app is running on the React client (Mx 10.24.15), that widget is not supported anymore, which is why you’re getting the “Not supported for React client” error.
One thing you can check is whether your Combo Box version has a “minimum search length” property. If available, setting it to 1 would make suggestions appear only after the user types at least one character.
Otherwise, the closest supported alternative in Mendix 10 would probably be using a Reference Selector with search enabled, as it behaves more like an autocomplete field in the React client.
Thanks