Just found this which on quick testing seems to work really well
https://smsagent.blog/2019/06/11/just-for-fun-send-a-remote-toast-notification/
Update - have spent further time testing this and it works really well to show a toast notification on remote computers in an AD environment, only amendment needed is changing location it stores image for toast as when running remotely the temp path it finds is admin rather than local user so just change it to a path all users can see and it works perfectly
Further information on customizing the XML can be found at links below for info:-
https://learn.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/adaptive-interactive-toasts?tabs=builder-syntax
https://learn.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/toast-schema