Hi @Nhật Ooker 👋
Welcome to the Community! When you hide a template it moves to the archive space so depending on how long ago this was you could take a quick look in there but a simpler way especially if it's buried under other archived cards is to...
Go to the side bar under Show menu and click Search Cards - making sure to clear the filter first. Unfortunately, I haven't found a function or been able to add a custom button to do this more simply.
I hope this helps but if you have any other questions just ask away 😃
All the best,
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