Bathroom sink drain

[NYSUPstater]

The stock sink in our '18 BC bathroom, the drain plug(?) is barely open. I looked underneath but really don't see much in way of adjustment to have to it sit higher (more open) in base of sink. Any suggestions?

 

[wdk450]

See if this helps:

 

[travelin2]

Take it out and remove the gasket

Ultimately I replaced the cheapy Rv model with a good household faucet and drain