Gantt chart - Help customizing it

Hi,

I'm looking for help customizing the Gantt visual (Microsoft). I never modified any visual and trying it is becoming quite frustrating for one or other reason, when the changes I want to apply are, in my opinion, simple.

I'm using the visual to display the different tasks in the last 24 hours for different personnel (categories, hidden in the picture).

What I'm looking for is:
- Reduce the total width of the visual. Doesn't matter what I do, the width goes over the page and the slider at the bottom appears. It seems the width of each task is hard-coded, but couldn't find the value in gantt.ts.

- The top axis. I want to make it disappear (not just changing the color to white, what I already tried) or just show the hours, not the day '(24)'. Same, cannot find it.

- Tighten the dimensions of the visual, as it has too much blank space surrounding it.

I did some changes to the gantt.ts file and I'm having a lot of trouble to package it too...

I'll appreciate any help you can provide and I'll be enormously grateful if someone with more experience and skills could do those changes for me.