How to undeploy (or disable) amplify backends

tl;dr: Is there an 'amplify delete -only-cloud' type option / capability ?

Hi - I'm doing a lot of experimenting with Amplify and a number of backends are being pushed to the cloud now (eg for testing and learning). Once I've finished testing, I want to keep all the local code for the project (local on my machine) but remove or disable whatever has been pushed to the cloud.

Is there an amplify command that will do this or alternatively some other way I can achieve the same ?

Many thanks in advance