Yes, you can switch to an older PHP version at any time if your website encounters issues after upgrading. To do this, open the MultiPHP Manager in cPanel and select the domain you want to modify. Then, choose the desired older PHP version from the drop-down menu and click Apply to save the changes.
Keep in mind that downgrading may cause compatibility issues with newer features or plugins that rely on more recent PHP versions. Therefore, it's important to test your website thoroughly after making the switch to ensure everything continues to function correctly.