IMO the reason you do not see real life pics of this is that it is not prctical. First the counter oon top of the W/D needs to be removeable or at least liftable for any service . As for the sink how tall are you is a 39” counter with asink in it going to work for you? I am pretty tall and love 39” regular counters but you need to figure that out. IMO you need 2 pieces one for the W/D one for the sink since you do not want to remove the sink if the W/D needs service.

Home Depot (and others) sell utility sinks pre-installed in a cabinet. Why not combine one of those with a flat-top* (i.e., usable for folding clothes, etc.) washing machine (e.g., LG WM4000HWA) and dryer (e.g., LG DLEX4000W) pair set side by side, and forgo the countertop?

If aiming for continuity, you could add a base to the cabinet. You may want to consider functionally, if sink is that much higher.

Other option is a lower cabinet if that’s more feasible for sink usage. Visually still looks good and just duplicate the counters.