What's your definition of room correction, then? We have a two channel setup here, where the left and right speaker are usually placed equidistant in the MLP. The only thing that might need adjustment in the time domain is the subwoofer.
WiiM do not attempt to set that delay automatically, but you can adjust it manually . They are in good company keeping it like thata. It's e.g. the same with $$$$ stereo amplifiers sold by Lyngdorf.
If the speaker has time domain issues, one might try to solve this using DSP, but it could hardly be called room correction then.
This is the same issue for all products and has been discussed over and over again. We don't need absolute calibration, but we do need a calibration for linear response, yes.