Hi @GentlePants,
this feature used to be a part of the Good Lock app and is currently not available under One UI 6. We can't say, if it is returning anytime soon, if at all.
There is a post in the UK Community discussing this topic as well: https://eu.community.samsung.com/t5/galaxy-s21-series/swipe-down-to-search/td-p/5943755/page/2
I recommend keeping an eye on future updates to see if the feature is part of Good Lock again.
