Does your X1 xprv and X2 xprv actually look like this: xprv9vBq3lgskdah4l5h2yt894th93hhbcbsdcgbhsjcguyegfUYGJHGFJHGFg34ff1Z68Mt3vsB3k6SVFk M

That is to say... does it start with the 4 letters "xprv" or does it look something like this: RhooCVdENKkQnsw1SelJzYpJetYscSqnHnc7vKw0bvsKpzv5VquuNKSsX6gBm74wWgv493iawJMGBFF 12OkUfZsES6L2fxDMpdYlfJtpJohGLuGj1sM7mGPppejGFZ9pbRrx1KUJnnQPvCFcaDzVVU5FAmCBVm +ykAuOqLxf2ME=


If it looks like the 2nd example (and ends in =)... "Rhoo.... ME=", then I suspect you have set a wallet password... as per the instructions, when you create the disabled 2FA wallet, you must NOT set a wallet password, otherwise the keys are encrypted and you cannot copy/paste them from the wallet file.

Use: "Wallet -> Password", enter your current password and then leave the new/confirm password boxes BLANK. This will remove the password from your wallet file and when you open the wallet file, you should see that your xprv is now unencrypted and starts with "xprv"

no, the seed is not enough.

it's just a password from which a software creates private keys. you need to know which algorithm is used to create the private keys.
in other words: you need the seed AND the "manual" how to do operations with this seed to create (or re-create) the private keys.

if you backup the seed, it is the same as if you backup the password to your creditcard, but not the credit card itself.
if you lost the card, you need someone who knows what was on the chip of the card (the banking account numbers) to get back access to your funds.

someone may correct me if i'm wrong:

you don't need to "recover funds" in any PC-wallets. you own coins if you know the private key(s).

with your seed (and some crypto-magic) you can recover all your addresses and the corresponding public and private keys for each coin coinomi supports.

with the private keys written down (paperwallet), you can delete the app. that's all you need for spending the coins.

the "crypto-magic" can be found inside the source-code of the app and the recovery-tool, too. print out the source code and you can re-code your own version of the tool, 20 years after the zombie-attack.

You can extract your private keys using this tool : https://coinomi.com/recovery-phrase-tool.html

But I think they don't include all the coins in their wallet, so if the project is closed in the future, they probably release more advanced version of this tool.