Not a Tronlink wallet user.
The watch wallet means you only can watch your wallet about your balance, transaction etc because you just import with your public key (address) means you won't have a control of your wallet.
However based on this article [1] you can made transaction with watch wallet
but you need your cold wallet (using private key) to broadcast the transaction (scan the above qr code), similar like Bitcoin offline transaction.
So IMO your coins are lost forever CMIIW.
[1]
https://developers.tron.network/docs/tronlink-cold-wallet