As someone who regularly visits Turkey for work I have found Monzo very useful throughout the four years I’ve had an account with them.
On switching to Monzo premium recently and receiving the metal card; I have twice has cash machines in Turkey swallow the card (basically it gets stuck and the default is to take it rather than keep trying to spit it out- makes sense really). Most bank machines do accept contactless withdrawal but not from Monzo or my UK HSBC card.
My point to this is just to be aware. It’s really easy to retrieve your card in the bank branch, just take your passport. I would also avoid standalone ATM’s for this reason.