For example, if I have an event in 2024, another one going from 2020 - 2028. Is it possible, when I either select the 2024 event or click 2024 on the timeline or stuff, I can see both events somewhere indicating that they’re both happening in the time I selected?
No there isn’t a way to view all events that are happening at the same time as another.
You can use the filter functionality to filter the events by date, so you could set a filter that only shows events happening in 2024.
You can do this by clicking the filter icon on the toolbar on the right (the pipe icon) and expanding the ‘Date’ heading to add the date range you want to filter events by.