Trello's not a project management tool; it's a workflow tool. That's why a lot of big orgs move to Jira. Unless you are engaged with the work flowing through Trello, then it's difficult to understand what's going on in detail (because it's not intended to do that).
(Well, you could add lots of columns to indicate state and ask folk to move cards on every state change, but they'll hate you for it )
You can't schedule in Trello per se other than ordering tasks, which is what it's very good at.
If you are set on "managing" "resource" allocation -- I suspect you mean team members -- then you could measure (sprint) done points pro rated against velocity and react as you feel is necessary. (Presuming you are using scrum.)
If you need to "manage" a project against some productivity measure, then Trello is a poor choice (as is Scrum and various kanban approaches).
However, if you want lots of stats and diagram, then take a look at https://ollertapp.com/ It unearths quite a lot of the hidden detail in Trello, although it can mislead, because folk don't use Trello in the manner expected by number crunchers.