If you don't want to subscribe to Roon, you need a streamer with Tidal/Spotify Connect which will allow you to use the native Tidal/Spotify app AND pass MQA to your DAC (in Tidal's case).
Meridian don't have any Tidal Connect enabled streamers. I have chased and chased to see if they're releasing any firmware updates for 210 but as per usual nothing from them.
In the meantime I have purchased an iFi Zen Stream which has Tidal Connect and is only £400. It gets very favourable reviews and is almost unilaterally considered superior to the Bluesound Node in it's price range (on streaming capability alone). If Meridian then decide to release updated firmware for 218/210, or a new streamer, then I'll whack it on eBay ... being the slave to Meridian that I am.
Alternatively if you want a permanent solution you can check out the Lumin Network Players which I was very tempted to go for but seemed a bit excessive for my (hopefully!!!!) temporary solution