Thank you Mark,
The setup as described by @NickBacon above works perfectly. The sound quality and user experience of playing local files with JPLAY from Squeeze/LMS to Squeezelite is fantastic on all Antipodes servers, but streaming with JPLAY in this specific server/player preset isn’t functioning.
If Material Skin can stream Tidal over Squeeze LMS to a Squeezelite player on an Antipodes server, what’s holding JPLAY back from achieving the same with Tidal? I’ll let you know here what Marcin “way more experienced with JPLAY than I am” thinks.