Does a penalty try count as first team points if no player is credited with a score?

Direct answer

A penalty try adds seven points to the team score even though no player is named as the try scorer. That distinguishes a team-points market from a named first-try-scorer market. Use the official scoring sequence and read how the operator treats penalty tries in the exact market; do not award those points to a player who never received official scorer credit.

World Rugby Law 8: scoring and penalty tries