Use Dynamic Instance Buffer missing in 4.20

Hey guys,

In 4.19 a child of Foliage Instanced Static Mesh Component had these option in the Instance Static Mesh Component category, Which allowed instances at run time to be removed during run time in a packaged game. But in 4.20 both the options below seam to have been removed and i cant seam to find any replacement options any where that allowed the functionally that these options allowed.

Image above is from 4.19

Does anyone know whats going on with this or what the replacement options are?

Thanks guys any help would be awesome.