If token's liquidity on DeDust is extremely low, its price is displayed as '$0'.
To make your token tradable and having the fiat ($) price, you should deposit to liquidity pool at least:
50 USDT + equivalent of your token, or
$50 worth TON + equivalent of your token.
Otherwise users would see '$0' price, face 'High value difference' warning, and won't be able to swap your token.
Token's $0 price in Portfolio
'High value difference' warning
Same refers to tokens having yet no liquidity on DeDust, but which are already tradable on other TON platforms.
Once you add enough liquidity, fiat ($) price is displayed and users are allowed to swap your token.
Token's $ price in Portfolio
Swap is allowed
Different TON wallets have their own conditions for token verification, fiat ($) price display, and tradability in wallet's interface. Reach their support to learn more, or whitelist your token on DeDust to cover the majority.