Metamask has also added it to their mobile version. rainbow wallet for mobile for example has a good integration for it as well. right now i have to use a seperate app on my mobile to use my ledger on my phone. if that would be in the zeal wallet, i would not need to use any other app anymore and i could technically switch fully to zeal for mobile. this would be a really big step forward for security and the ability to fully use the zeal wallet as your main wallet. this would also really be a useful feature because this way you can use your ledger to add funds to your gnosis card.