Banking

Is there any requirements such as: in-country time needed, and or pedigree documentation, [ie] passport, state and or federal government, issued proof of identification, to open a bank account?
When I arrive in Siem Reap can I go directly to a financial institution and open a bank account?
Thank you, Best wishes & Cheers!  :unsure

https://www.expat.com/en/guide/asia/cam … bodia.html