Subfolders are not searched

Just got my new M1 Pro MacBook Pro with OS 12 and all of a sudden it's not searching subfolders. How can I change any settings to search subfolders? I'll explain why this is a big problem: was looking for a file not realizing it was in a subfolder of the searched folder and search on the folder didn't find the file. Then I searched 'This Mac' which found it along with about 50 other files which also had the search word in them so it was actually harder to find what I was looking for doing a search then looking for this file manually. How can I change search option to search subfolders? I pulled out my old MacBook Pro with El Capitan again and it does search subfolders. Thank you!