Access function parameters from material instance

Development Programming & Scripting Blueprint
, , ,
1

I’m currently working on my first master landscape material. I want to make everything more compact using functions. I saw in tutorials that I can change parameters of function from material instance where I use function (for example in this How to INSTANTLY TEXTURE your landscapes in UE4 - Unreal Engine tutorial - YouTube from 4:01 to 4:47)
For some reason I don’t see my parameters located inside the function in material instance. What can with it?
UPD: Screenshots in comments

2

image
image1010×1213 365 KB

My Material (function is selected)

3

image
image1709×1037 179 KB

Material function

4

image
image1000×1002 192 KB

Properties of parameter (they are the same for every parameter)

5

image
image1469×1272 84.1 KB

Material instance of first material without options from function

6
7

He still uses normal inputs. But in my link author somehow directly managed parameters that are inside the function without inputting them from outside

8

(post deleted by author)