Question about BOHOLMEN sink

Fortunately, Ikea has learned and now sells the closure separately. It also fits other sinks (unfortunately, the manufacturer of my sink no longer carries sinks) and the Atlant system will probably continue to be supported.

So, bought a small square Boholmen including stopper lifter.

The cabinets are already assembled.
Tomorrow, the countertop, the wall finishing strip, and the baseboard will be purchased.
Assembly will probably take place on Thursday.