If Don't Starve Together items are not showing up, or are missing from your Steam inventory list, this means that your setting for the game's Steam Inventory is currently set to "HIDE".
To unhide Don't Starve Together in your Steam inventory, visit your Klei Account user page ( https://accounts.klei.com/account/settings ) and look for the "HIDE STEAM INVENTORY " section on that page.
On “HIDE STEAM INVENTORY” section of the page, remove the check mark for "Don't Starve Together" as putting a check on the box hides your DST inventory on Steam. Once the check box is empty, click on "SAVE CHANGES" to complete the process.
From there, log out of Steam and then log back in and you should find the Don’t Starve Together items listed in your Steam inventory.