If you have multiple logins or different accounts, there is not a way to view them all on one display. Ex. you cannot view the combined schedule for various linked accounts.
You can however, set up a “switch list” which will allow you to use one username and then quickly access all your logins from the top menu in different windows or tabs.
The only way to view separate accounts in one view is to export to Google calendar from each login and then view it in Google calendar.