Wormhole Display Revives Abandoned Meta Portal Hardware as an AirPlay Monitor
GitHub - pgodlews/wormhole-display: Give your Meta Portal a second life as a wireless display and speaker for Mac, iPhone and iPad (AirPlay-compatible receiver)
Wormhole Display is an app that turns discontinued Meta Portal devices into wireless displays and speakers for Macs, iPhones and iPads. Once installed, a Portal appears as an AirPlay-compatible receiver and can be used for screen mirroring or as an extended Mac display, with audio through its built-in speakers.
Portal devices are Android-based, so the app is installed as an APK after enabling ADB. The project has been tested on Portal+, Portal Mini, Portal Go and Portal TV, and requires no special software on the sending Apple device. It was released by Piotr Godlewski.

Remove the abandoned service from a dedicated appliance and what remains is a surprisingly useful screen and speaker. The Portal may have become more versatile after its original job ended.