I think the capability may exist in the device but the WalkPlay web app doesn't show it (perhaps I'm just not seeing it). Everything else seems to work ok, except the level setting is not in db, or if it is, is not correct. I haven't measured it but -1 sounds like a couple of db and -2 sounds like -4 to -6 to me. For me, the app is the only weak point and with my speakers, that don't need a HS or LS in their EQ even that isn't a problem. It will be for other speakers though.
One problem I am having is occasionally I have to unplug and replug the device into my PC. It always happens when I haven't been playing anything for a while and then when I start some music, I just get loud static. My PC is old and doesn't have USB C ports, so I'm using an adapter to USB A which may be the reason. I'm just about to build a new PC so I'll find out if it's just an incompatibility with the old ports.