my ledger wallet about to get screen die, so I quickly sent those funds out there to a new wallet. so I can't connect electrum to get help from RBF (now ledger broken and importing just seed on electrum doesn't seem to be working. )
Seed phrase generated from ledger nano is BIP39, importing it on electrum is compatible and it should work perfectly. The reason it may not work is if you did not mark BIP39, you have to indicate while importing the seed phrase on electrum that it is BIP39. Also, you need to be certain if you use passphrase, if used, you will need to include the passphrase while importing it on electrum, if you did not include the passphrase, you will end up getting another derivation entirely.
About your transaction (b7dc92e749b752a5b599ac3f5866d9126ab85fc47e823148853a6a66fd54a45f), it is not supporting RBF, with 13 inputs which makes the fee much more low than to be confirmed early, the transaction is almost a month, but the last time it was rebroadcasted was
four days ago, which means you still connect your ledger wallet online four days ago in which automatically rebroadcasted the transaction at the time. It may likely still say in the mempool for almost 2 weeks.
If you control the address it is sent to, you will have to spend the unconfirmed output and send to another address on your wallet you sent it to with a fee that is high enough to confirm two transactions in time.
For your second and third transaction
2532845582ee131cc63850d46101aa88fcc919ce0c2dacb82795d693e9129597
36a6e5a524cfa657537bd5be54fba7119d536a5497a47f055e36b2fd9ab7e387
It supports RBF, try to just import your seed phrase on electrum by follow what I explained above, make sure you click on BIP39 because the seed phrase is not from electrum directly, and if passphrase is included, include it.
Your fourth transaction
Probably most mempool have dropped the transaction, if the seed phrase importation is successful, you should be able to rebroadcast it again, make sure you spend the same input you spent the last time.