For example if I have usdt in Tron network. How would I restore the Tron wallet securely using the 24 hour seed phrases?
In case you have many altcoins controlled by the private key on the hardware wallet, I will not advice you to import the seed phrase into Electrum wallet because you will need to import the seed phrase on a wallet that will let you be able to have access to your coins, and for altcoins, these wallets can be online wallets.This is my advice. After you first import the seed phrase into Electrum wallet, then send all the bitcoin on the electrum wallet to your airgapped Electrum wallet(which is of course another wallet) in which transaction fee will be charged, then your bitcoin is safe. For altcoins, you may not have option than to import the seed phrase on the online wallet.
You will still want to buy another hardware wallet, generate another seed phrase and transfer all your coins individual with transaction fee charged to the hardware wallet.
If your hardware is damaged, you can still like the option above. But if your hardware wallet is stolen, even better to send the whole coins into another wallet also in which transaction fee will be charged rather than importing it.
