Yes, all buttons including the cursor keys are working in both current integrations:
- Home Assistant integration of @JackPowell
Home Assistant LG Horizon integration for Ziggo Next Mini - #7 by aruit
GitHub - JackJPowell/hass-unfoldedcircle: Home Assistant Integration for the Unfolded Circle line of remotes
GitHub - Sholofly/lghorizon: Custom integration to control LG Horizon settop boxes for Ziggo(NL), Magenta(AT), UPC(CH), Virgin(GB, IE), Telenet(BE) - Unfolded Circle integration of @M.a.S.e
European Cable TV Box (LG Horizon STB) Integration - #6 by sigerm
GitHub - mase1981/uc-intg-horizon: Control your LG Horizon TV boxes with Unfolded Circle Remote Two/3