'Reduce bass' option not showing on HomePod mini

I currently have two HomePods, 1 in the the living room, the other, (purchased today) in the kitchen. Having set up the one in the kitchen I see that the 'Reduce bass' option is not showing, whereas it is on the one for the living room. I should probably mention that during the setup it showed two grey HomePods, while I have one white one (in the living room) and the new one (for the kitchen) is grey. I was also prompted to set these up as a stereo pair, even though the software should have known they were in different rooms. I owned two HomePod minis in the past but sold them. Could that be a cause of confusion for the setup process? I did fully reset the old ones, and followed the process exactly for removing them. Pls help.

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