Full MQA can be experienced in analogue only.
First unfold MQA is available digitally, for example from TIDAL over USB and from any of the Meridian source products (except the UltraDAC) listed above.
Full MQA is the sum of the first unfold and the second DAC-related* processing (hence the analogue only comment above).
If you use the analogue outputs of the 218 into the f80 analogue input you will get full MQA.
If you use the digital output of the 218 into the digital input on the F80 you will get the first unfold.
There is a lot more to it than that and I am sure others will chime in. I have tried to simplify it down to outcomes rather than signal path processing.
* the second part of MQA corrects for the DAC so, by definition, it can only be experienced after the DAC, i.e. in analogue.