What I actually do not know - as the webradio-stations do have different names there might be more names if i tried to access other radio-stations (but this is quite annoying as the AVR freezes as soon as you insert a not working webradiostation…)
tmo-datum.metricowireless.com would be affected by that “fix” in libknot >= 2.6.0 (released upstream already but not in Turris yet). As always, I see no way to be certain that a device will be fixed by it until it’s tried. In the meantime you can work around by various other ways, e.g. Yamaha receiver problem with Knot DNS
The upcoming release (Turris 3.9) contains the workaround in libknot, so we expect that these smart-device problems should just disappear without needing any configuration workarounds. 3.9 RC announcement.