Shows in data - I assume a bug?

A base of 1 was added to Templars so they could see their mod stealth without having to try and calculate it. Not a bug

Every arch has 1 base imm and stealth as they already applied their effects before but u had to figure out what it was from calculating bwias & gear, so now u can just see it.

But should it show as a quest with Selena house under data? That was my issue. I kept thinking I had to turn something in.

Is it showing even after you got the skill? I believe anyone who archs after it was added should start with the skill but not see the quest, everyone else has to do the quest as I can't automatically give it to everyone
edit: oh u mean the quest is pointing you to serena's house, that's because it has the same quest item as stealth which is in serena's house(the sword of stealth) but you still have to turn it in to laurel, she is in prospect peak.

Yeah base Temp skill, couldn’t find her, but I will look in PP

Stealth/Immune was added to arch classes as quests a few months ago.

Gives you the ability to see your mod (it wont go higher then 1base).
NPC is in Prospect Peak to the West.

Gives A-Harakims Stealth/Immune visibility.
A-Templars Stealth
Sorcs Imm
etc

Found her but still can’t give her sword on non arch temp.

Update - on arch it auto updates so its fine. Just non arch temp it shows as a quest but doesn’t update. Do what you wish just passing along.

OK I am not sure that I understand what is working or not working...

A new templar character shows stealth as a quest. You can’t turn in the sword and complete off the list. If you arch, it clears.

Since you don't get the benefit until arching it likely isn't a huge issue that a player can preclear the quest while unarched, so you are flagged to change over as soon as you arch.
Likely /data should be changed to Laurel for the applicable races and her text updated if she doesn't specify what or when she wants the sword.