I just searched for your items and didn’t find them and I 'm pretty sure I couldn’t search for my own when I was on holiday. So my conclusion was that items in shops on holiday are not searchable but it could be a timing thing as to when the items are indexed.
On the good side your shop is 100% visible to anyone going in there directly but… if someone goes directly to one of your listing they will see it as “unavailable” without knowing that that is because your shop is shut.
The holiday notice only shows at shop, not listing level.
This could be something which needs addressing by Folksy support
@sianfolksy - Maybe the “unavailable” could be changed to “not available at the moment - shop is on holiday” to differentiate between unavailable because it is out of stock ??