Seven players, round two, and you speak second. Nobody has said "Dapp!" yet.
Your hand
Do you claim the Dapp?
Answer
Pass. Two Kings are not two tricks: with six opponents somebody is almost always out of the suit and trumps a lone King. The XVII would need five other Taroks to be a trump stop, and you hold one, so without a trump stop, pass. After the exchange both Kings would still be among your six cards, because Kings may never be discarded.
Rule: A lone King: in Dappen, do not count a lone King as a trick. With five or six opponents, somebody is almost always out of its suit the first time it is led, and the King gets trumped.