I’m playing as Zane on PC at level 23. I started The Handsome Jackpot DLC and am as far as Casa de Timothy. I intend to return to the main mission (The Anvil) and play this for a while. If I returned to Casa de Timothy at say level 30 would the rest of the DLC be at level 23 or would they adjust to level 30?
Have you completed the vanilla story yet? If so, you could activate Mayhem mode to level everything up to your level. Otherwise I think they will stay at the level you started them at, emphasis on I think. It has been a very long time since I leveled up a character.
I concur. Pretty sure DLCs in normal are locked to the level you start them until you activate Mayhem