When importing from a table that includes date and time columns, only the date is imported, not the time. That's really not helpful.
Also, to those who say that sync is needed...where would these lists sync to? It makes sense for Document Libraries to sync because files are files. There is no concept of "Lists" in Windows (or Mac OS, or Linux) - at least not in the same sense as Lists in SharePoint. In classic SharePoint, there were some list templates that could be synced to Outlook, like Calendars, Contacts and Tasks. While this was an occasionally useful function, it had serious limitations that frustrated many end users. It made people think of their SharePoint Calendar as an Outlook Calendar, and it wasn't, which ultimately confused and annoyed people.
Or, do you mean you want two-way sync between the Excel file and the SharePoint list? That would be cool, but I'm sure is much more complicated than we would imagine.