Rather than using opening_hours=closed, there's the option of using a lifestyle prefix for features which are no longer open, or have been removed entirely. StreetComplete will prompt passing users to re-check some of these at intervals.

In this case, you could consider changing shop=toys to disused:shop=toys and possibly add check_date=2023-04-21

https://wiki.openstreetmap.org/wiki/Lifecycle_prefix
https://wiki.openstreetmap.org/wiki/Key:check_date