Hence why you should not have banking/brokerage apps on your phone (or their passwords in your iOS keychain), except maybe a checking account with a couple thousand dollars in it.
In Australia, transfers out of an account are limited to a certain amount ($2000 typically) unless you've pre arranged it with the bank. Also transfers to new accounts have some extra protections. I'd be surprised if this wasn't common practice globally
Not true. You can set a number of accounts to up this in the bank app, with nothing more than a sms code to protect you. $100k no issues. And never seen a $2k limit, maybe a $5k limit.
I can do transfers of at least $250k from my phone.