Combining Order Data from Multiple Rows Into Single Row

Hey, everyone! Have a spreadsheet with 2 columns (attached): orders and items. Each row represents one item in an order, so orders w/ multiple items get multiple rows. I'm needing to show instead each order on a single row and if any orders have multiple items, I need them listed in the same cell, separated by a semi-colon. Can anyone please help with this? Formulas or Power Query preferred over VBA but all methods accepted.