Are there any devices with a good Kodi integrated Netflix/Amazon experience, that don't require switching to Android?
I use an Apple TV 4K for Netflix and Amazon Video along with a nice modded Kodi Jarvis Fork called MrMC. I really don't use a lot of Kodi Addons so MrMC is perfectly fine and works well. Excellent TV deinterlacing for Kodi PVR usage.
It craps over anything Android TV has to offer video playback wise simply due to working tvOS auto frame rate matching for smooth video playback with virtually all Apps not just Kodi and Plex and working auto colorspace switching for SDR / HDR10 / DolbyVision. All the local IPTV Apps are tightly integrated into the tvOS / TV App as well, a LOT better than Android TV.
Then simply buy an AML LibreELEC Kodi Krypton companion device if you want the full blown Krypton Addon and Skin experience.
You will not get smooth 1080p Netflix or Amazon Video using any of the LE Kodi Leia / alpha Addons on any AMLogic device. Max. 720p only. Dedicated Apps for such services are much easier to use and have more bling anyway.