From testing, the attribute table gets refreshed when there's a new edit - add/update/delete so no manual refresh needed. When one minimizes the table, it minimizes to the task bar (on the bottom of your screen) in a way. You can hover your mouse over the ArcGIS Pro icon on the task bar and you'll see the minimized table and can maximize it by clicking the table icon. If you click the X to close the table, it closes/disappears. Then you'll need to reopen the table via a right-click on the layer in the Contents Pane-> open or select the layer in the Contents Pane and hit your CTRL-T hotkey to open the table.
