Gorm Hareth:
Is there somewhere I should look for guidelines on things like starting gear past 1st level, mundane or magical?
This adventure,
PotA, may have specific rules for that - probably having magical loot rather than rolling. The
DMG on page 38 says it's at the DM's discretion, but has a guide at the bottom of the page based on tiers.
(For the games I DM I make it more granular - based on levels rather than tiers, and I use
https://www.enworld.org/thread...395770/#post-6468347 for magic items, tho players can only keep a single consumable rolled, and I pick from the non-consumable tables (like table F) to make sure the items are balanced.)