Enable the new Insert Custom Visual experience in Excel 2019 Pro Plus

Hello Sir,

I am trying to find or enable the new Insert Custom Visual experience in Excel 2019 Pro Plus (Microsoft Excel 2019 MSO (16.0.11328.20156) 64-bits)

My Excel is not showing this in the ribbon. I am using Version 1902 (build 11328.20158)

There is a chapter called Try Example Visuals in the link here: microsoft.github.io/PowerBI-visuals/docs/building-for-excel/testing-in-excel/

There you can see in the chart ribbon there is an extra + (plus) icon to Insert Custom Visual.

But no luck so far, I can not find it in the chart ribbon.

Do I have to enable this somewhere, or setup an add-in ?

Please shine a light on this, I love to see the powerBI .pbiviz custom visuals running in Excel.

Thanks in advance.

Regards from Amsterdam,

Arthur