WY has different versions/configurations of B787, with 5 and 3 rows, in addition with those with first class, each of them has the Apex suite.
You can see here the version with 3 rows, 18 seats only https://www.omanair.com/en/flying-us/our-fleet/fleet-information-3
KQ took back all the leased AC since months ago; Oman air just leased an A330 from Srilankan beginning of June and is deploying it on the route to Jakarta only.