Hi Neil,
Thanks for posting on the community! You are right; currently, there is no way to automatically set different can and bottle smallpack product BBE dates. There is an open feature request for the function to Input BBE (best before/expiry date) at confirm racking stage, which might be helpful as a start; if you want to give that a vote. Otherwise, if you need a mechanism for Breww to automatically assign different BBE dates based on the type of small pack, then I am sure we can look at whether this is possible for you if you wouldn’t mind raising this as a feature request so our dev team can review it for you.
If you have any questions at all, just let us know!