Here is the release note for BO. If you are looking for POS or Add-on functions, please take a look at other pages.
Improvement
1. Divided the Chinese language option into Simplified and Traditional versions
2. Enabled saving of the user's selected view mode, which is now applied instead of the default setting
3. Added a promotion limit feature to BOGO (Buy One Get One) promotions
4. Added multiple payment gateways and options under Payment Settings
5. Enabled users to feature selected items and add icons to highlight item attributes, such as spice levels.
Bug
Fixed display error where the wrong location was highlighted instead of a tab