It is possible but sort of diminishing returns.

Is it possible to have a function where we can adjust the platform distance from the track? So that we can get rid of the gap :)

Secondly, is it possible to make a freightplatform that is as loow as the top of the sleepers? This to make it look like a more realistic freight terminal :) (with the option to change textures like asphalt or concrete)

The gap is required for bends. I thought of adjusting the gap depending on the radius, we'll see.
You can lower and raise freight platforms today, but not as low as the sleepers. We'll see.

Feature requests:

1. have a roof at platform extensions:
https://i.ibb.co/S0NrSNj/Screen-2024-06-17-22-15-26.jpg

2. have a wall at platform end entrance corners:
https://i.ibb.co/ryDqftL/Screen-2024-06-17-22-14-42.jpg

For 2, add an extension to make the platform wide enough. The wall will adjust. Have you added a platform end? It's new and it opens new options.
For 1, we'll see.
For above, there is now a 0 m platform, only for cargo (technical reasons).

Please add pillars as track assets, because there are those types of bridges without pillars.

Please make it either compatible with or have a similar feature as:
https://mod.io/g/transportfever2/m/trains-stop-at-platform-end#1125585

If you add a head to a platform, trains will stop at the end. Otherwise, they will stop in the middle.

The point is, it's possible to move the node where the train stops.
It just defaults to the middle of the station platform by vanilla means. Unused potential.

Build a freestyle station. Open the config menu. Add a platform head.
-> Trains will stop at the end
Other than that, I am not really interested in customizing where trains stop.