multisig on monero requires out of band signing.
the necessity will be eliminated in the Seraphis update (coming soon ™)
Discussion
Ou of band, sort of like taproot and musig schnorr that always look like singlesig on-chain?
nono sorry wasnt clear
you have use the cli wallet to export the partially signed tx and import it into the other wallet signers
its a huge UI hassle and nobody does it
if interested:
It seems possible to create a program similar to Bisq that could do trades using multisig escrow with Monero and simplify the UX of what is done with Monero CLI only and multiple wallets.