• Checkout performance improvements - #6552 by @d-wysocki, @maarcingebala, @fowczarek
• Drop deprecated fields from the ProductVariant type: quantity, quantityAllocated, stockQuantity, isAvailable - #6436 by @maarcingebala
• Drop authorization keys API - #6631 by @maarcingebala
• Fix pricing on product with missing channel listings - #6626 by @fowczarek
• Fix available shipping method price rules - #6643 by @fowczarek
• Fix variant resolver on CheckoutLine and OrderLine - #6641 by @fowczarek
• Add filter through channels in orders query - #6633 by @fowczarek
• Ability to add shipping zone's description - #6653 by @tomaszszymanski129
• Add metadata to menu and menu item - #6648 by @tomaszszymanski129
• Extend order line with total price - #6640 by @IKarbowiak
• Get tax rate from plugins - #6649 by @IKarbowiak
• Add order shipping tax rate - #6678 by @IKarbowiak
• Fix reordering products duplicates - #6666 by @d-wysocki
• Add libraries for additional image formats - #6677 by @patrys
• Added support for querying user by email - #6632 @LeOndaz
• Fix updating shipping method in the case of delivery days having no values - #6689 by @pdblaszczyk