The original HomePod was Apple's answer to the Amazon Echo, but with more of a focus on music and sound quality. After 4 years on the market, Apple discontinued the original HomePod as of March 12, 2021, and will focus its efforts on the smaller and cheaper HomePod mini launched in November 2020.
Apple gave TechCrunch a statement about the discontinuation:
HomePod mini has been a hit since its debut last fall, offering customers amazing sound, an intelligent assistant, and smart home control all for just $99. We are focusing our efforts on HomePod mini. We are discontinuing the original HomePod, it will continue to be available while supplies last through the Apple Online Store, Apple Retail Stores, and Apple Authorized Resellers. Apple will provide HomePod customers with software updates and service and support through Apple Care.
However, almost two years after the original HomePod was discontinued, Apple introduced the second-generation HomePod in January 2023.
When the HomePod initially launched, users could only ask Siri to play songs from Apple Music. Thankfully, that changed in 2020 when Apple added support for third-party music services. In addition to Apple Music, HomePod users can also link accounts from iHeartRadio, Pandora, Deezer, YouTube Music and TuneIn, but there are also a lot of notable omissions - including Spotify, Tidal, and Amazon Music.
Does that mean it is impossible to Play Tidal on HomePod? Of course not. You can play Tidal on HomePod with AirPlay.
1. Open Tidal app, play a song and open the Now Playing window.
2. Tap the Tidal Connect icon and choose Airplay & Bluetooth.
3. Select your HomePod from the list.
4. Now the song will play from HomePod.
Another option is to download Tidal songs to MP3 and airplay them from Music app. In this case, you can even play Tidal music after cancelling subscription.
Pazu Tidal Music Downloader is designed for downloading online streaming tidal music and converting it to actual audio files (such as MP3, M4A, AAC, FLAC, WAV or AIFF) for saving to your computer. With Tidal Music Downloader, you can download individual songs, as well as entire albums or playlists. Therefore, you can have full control over listening to audio files. What's more, the HiFi sound quality will not be affected after the conversion. You can still enjoy a high level of audio listening. After downloading, playing music is not limited by device or membership requirements. It is completely possible to listen to music offline on any device or platform.
Download, install and run Pazu Tidal Converter on your Windows, which features a built-in Tidal web player.
If you have purchased a license, click the key icon to register the converter. If not, continue using the trial version.
Follow the onscreen instructions to log in yout Tidal account.
The default output format is M4A. Pazu Tidal Music Converter also supports MP3, AAC, FLAC, WAV, AIFF. Click the Gear icon on the top right corner to change output format or output folder if you need.
You can also customize output song name with any combination of Title, Artist, Album, Track Number, Playlist Index.
Click any playlist you want to download.
Then click the red icon to load songs. All songs in the playlist will be added by default. You can uncheck the songs you don't want to get.
Click Convert button to start downloading Tidal music to the format you choose.
After conversion, click the folder icon to quickly locate the downloaded Tidal songs in the format you choose.
1. Open Music app, click File - Add To Library and choose above output folder.
2. Play a song. Click 
in the playback controls, then select your HomePod.
As you have downloaded Tidal music to local audio files, you can Airplay them HomePod even after cancelling subscription.
Download Tidal songs/albums/playlists to M4A etc.