So you mean you imported the seed phrase generated from the ledger hardware device and then imported it to the Jade hardware wallet and now you are trying to make a transaction and use Jade to sign the transaction am I right?
Have you tried to make a new wallet in Electrum and choose hardware wallet it should be recognized by Electrum wallet. Read this below
Tip: Before connecting your Jade, make sure the Blockstream Green app is not open. If Green is open, this may cause issues with your Jade being detected within Electrum.
So make sure the Blockstream green app is not open before you connect the Jade HW.