This isn't talked about enough:
Storing your mnemonic seed alone isn't enough, you also need to store the derivation path.
Ledger Live software is generally unusable on my (Debian Sid) system. It does enable RBF when creating a tx, but it doesn't allow you to bump the fee.
Had some serious issues when importing my seed into Electrum until I found out it was using an incorrect derivation path. Only when I (manually) fixed that, I could see I had > 0 satoshis.
Write it down to avoid panic ;)