Hi Pol,
Greetings from Syncfusion support.
We have checked on your requirement and suggest you set the
required height for the Schedule work cells by overriding the default Schedule
CSS styles like the below code snippet.
.e-schedule .e-timeline-view .e-work-cells,
.e-schedule .e-timeline-month-view .e-work-cells,
.e-schedule .e-resource-cells{
height: 100px !important;
}
Sample: https://stackblitz.com/edit/angular-ky5kqm-e2kfmx?file=app.component.ts,app.component.css
Output:

Kindly try the above sample and let us know if you need
further assistance.
Regards,
Ruksar Moosa Sait