You have to import the seed phrase elsewhere because you don't see the coins in the blockchain.com wallet that you are using now. But that wallet is known for having all kinds of bugs, so I am not surprised. If you had access to your coins on blockchain.com, you could simply create a new wallet with Electrum (with a new seed), and send everything from blockchain.com to the newly created Electrum wallet.

Doing that creates an on-chain transaction + mining fees, but as o_e_l_e_o pointed out, you will have a seed generated in a somewhat safer environment compared to a web wallet. If your computer is malware-free of course. When you import your seed to a second wallet, you aren't creating any transactions. You are just replicating your wallet in a different client. But you are still using a seed that was in contact with a web wallet.