Thanks for the reply!

I already use many crypto wallets; Electrum multi-sig being one of them, Guard is just another one I use and sadly having a problem with it currently.

Once you login to the Guarda App, and go to settings of your BTC Multisig wallet, and click on PRIVATE KEY, you are given a Mnemonic AND a PrivateKey which looks like a lite coin address almost. I'll create a fake one so you can see an example of the key I can see:

L98km2ZaKaoXieoKK9]Hj8850jDjnEZykOwwhx092j8iL9zz

Unfortunately there's no manual exports of a transaction like you can on Electrum, hence I cannot manually export it and give it to my co-signer for him to load and sign off.