Hi Marcin,
Greetings from Syncfusion.
We have checked your requirement “Timeline view in vertical”. We suspect that your requirement can be achieved by using Day view of SfScheduler. If you want more days in a view, you can also use Week view or WorkWeek view.
Please refer our UG documentation to know more about Schedule Day views,
If shared information doesn’t meet your requirement kindly revert us with more information on your requirement, we are always happy to help you out.
Regards,
Karthik Raja A