Quote from: francuss on July 15, 2023, 11:23:52 PM

Tried to google for TXID but all results point to blockchain explorer and in the transaction page of it I can find no mention of TXID

You can your transactions ID in transaction history of your address. Any block explorer should display that.

Quote from: francuss on July 15, 2023, 11:23:52 PM

That is the first thing I checked. But the set of addresses are totally different, at least looking at the beginning. So I thought that different wallets may mix the addresses randomly, but the same be able to receive the transaction, for that I tested with real money.

Either you are importing a wrong seed phrase or the addresses you are looking for had been generated on an uncommon derivation path.
Provided that you are generating the addresses on the same derivation path, your seed phrase should generate the same addresses with the same order.

Quote from: francuss on July 15, 2023, 11:53:37 PM

Does anyone know how to import single addresses into Electrum? Well, in my case into the "hot" Electrum

Create a new wallet and select "Import Bitcoin addresses or private keys" and enter your address.
Take note that with importing your address, you create a watch-only wallet and you won't be able to spend your fund from that. A watch-only wallet is used for checking transaction history and creating unsigned transaction. If you want the fund to be spendable, you should import you private key, instead.

For importing your private key, you should add a prefix to specify the address type.
You should use "p2pkh:" prefix, if your address start with 1, "p2wpkh-p2sh:" prefix, if it starts with 3 and "p2wpkh:", if it starts with bc1q.

For example, if you want to import the private key of an address starting with bc1q, you should enter your private key in the following format.

Code:

p2wpkh:bc1q.....................

It may worth mentoning that with entering your private key on an online device, you would reduce your security.