Expand my function for every cell.

Good day,
I am working on a school project and I am totally new to excel.
I have a liddle problem by expanding my function.
I can expand it to the right parts but I canīt expand it on the hole matrix.
I know I have to change my fixed variables but I have no clue in which format.
Please see the attached xlsx.
I could expand the code also into the bottom but i canīt do it for the hole matrix.
Maybe I need a second request for my second question but why not try it here.
I would like to have a conditional format. It works perfectly in my sheet but I donīt want to see my values (dates).
How can i make them invisible? Or format them to the same color like the cell color automaticly?

Many thanks in advance!

Kind regards,
Artem

It compares the start date with the dates and if it the date is the start date it writes the date down until it reaches the end date.

Have you opened the file I think if you open the file and click on one field where the formula works you will understand

So let me be more specific.
This is the formula which works look Pic Nr.1Pic1.PNG
I could expand this formula to all right cells.
Now i want to expand this to the hole matrix.
It should look for the "Start" and compare it to each date from cell D3=20.04.20 until BU3=26.06.20
when it finds the start value so it writes the date down until the end date. It works perfectly for the row 4 and 5.
but i addad it manually to row 5 but I want it all over the matrix.
I could manipulate the formula for all Cīs but I canīt expand it to the matrix.
Look Pic: Pic2.PNG

Please be so kind and advice me if you need further information.