Why did the clothing items never get equip options? I'm talking about similar to the armor, marking which outfit in your inventory you're wearing. I get other things are more important, but it's a small possible quality of life improvement that could be made.

Hello there foxfirefizz,

I do not speak for the D&D Beyond staff, but it might be because equipping regular non-magical clothing generally makes no changes to your character in the game’s mechanics.

Probably what haggis said. The equip option is not so much what you are wearing, but what is active on the character.

When inventory management gets added, it will probably have an option for what is worn.

You only have the wear/equip option for stuff that makes a mechanical difference do your characters so the software knows to apply the modifiers. There's no effect to 'wearing' common clothes, same as there being no effect to equipping a trinket. As such the software doesn't give you an option because it'd be redundant

My reasoning is that it helps keep track for when you have multiple kinds of clothes on the same character.

I can't think of a reason to mechanically track what kind of mundane clothing you're wearing. It would surely only matter for RP situations, in which case you'd just say "I change into my noble clothes"

The idea would be for long term stuff. It would just help track things for players. I get that stuff with gameplay impact takes a higher spot in the development que, but I was only trying to suggest something that may help with inventory management, similar to adding containers.