Can someone verify for me that OnUs checks and US Treasury checks deposited at our ATM need to be next day availability with no exceptions?

Technically, no, because there's an exception.

Yes, as to on-us checks.

No, as to Treasury checks if they are not deposited to an account of a payee of the check. Yes, if they are deposited to an account of a payee of the check.

Thank you very much for confirming.