Thanks for the question, Rob.
What you’re asking for isn’t possible just yet, but it would make a great feature!
We have an open feature request already, which I think covers what you’re looking for at Additional stages in brew schedule, such as dry-hopping & centrifuging (batch schedule events). If that looks like what you need, can you please give that thread a vote, as this will help to push it up the priority list.
For more information on how we handle feature requests, voting and prioritisation, please see 💡 Posting ideas & feature requests for Breww 💙. Thank you.