Trust Wallet TRC20 USDT Locked - Unable To Send Or Swap Funds

I use the Trust Wallet iOS app and I hold USDT on the TRC20 network in my wallet. For some time now, a portion of my USDT has been showing as locked and I cannot swap it or send it to another wallet, even though I have previously made successful transactions with my USDT from this same wallet without any issues. I do not know why these specific funds are locked and there is no clear warning or explanation in the app that helps me understand the reason. I want to be able to use my USDT freely, just like before. I kindly request that my TRC20 USDT in Trust Wallet be unlocked as soon as possible or that I am provided with a clear and detailed explanation of the reason and the steps that need to be taken so that I can access and use my funds again.