Android Pushover App without Google Play Services (Websockets instead)

Hi,
It would be great if the PushOver app for Android did not require Google Play services to run. When using custom ROMs like GrapheneOS, Lineage or similar privacy focused ROMs, the Google Play services are either not present or installed without network permission (Play services are deliberately signalled as offline). It would be great if the Android PushOver app could use the already available websocket itself as an alternative or fallback on such devices to register a new device and receive the notifications.