If a parent is not receiving app messages but within Schoolcomms > linked people there is a tick under using the app, please check if the contact method within linked people also includes app.
Please ask the parent to logout of the app, uninstall and then re-install School Gateway. This will ensure that they are using the latest version of the School Gateway App. They will then need to enable push notifications and remain logged into the app to ensure they receive app messages.
Please click here for information on how to enable push notifications for School Gateway.
If the parent's contact method still doesn't include app, we would require consent from the parent to carry out further testing on their School Gateway account. The school would need to forward this to support@schoolcomms.com or click here to submit a request.