I can’t find a subscription I have in the app to cancel

Managing auto-renewing subscriptions -

http://support.apple.com/kb/HT4098

M1 Mac mini, macOS 12.0.1; Watch, series 5 GPS/cellular, watchOS 8.1; iPad Pro 2nd Gen, iPadOS 15.1; iPad Air 2, iPadOS 15.1; iPhone 12 Pro, iOS 15.1; TV 4th Gen, tvOS 15.1; HomePods, audioOS 15.1 and Airport Express w/ Airplay 2

I want to cancel my free trial subscription? How can I delete it if I can’t find it in my subscriptions?

On what device? A Mac? Did you get the free trial app from the Mac App Store or elsewhere?