The Federal Reserve proposed a change to Regulation CC in 2009 to require that same-day availability banks disclose if funds are to be made available on the same day. However, with the passage of the Dodd-Frank Act and the transfer of regulatory oversight of Regulation CC to the CFPB, the Federal Reserve never finalized its proposed rule. Consequently, the model language and the disclosure requirements remained unchanged.
From a UDAAP perspective, it may be a best practice to accurately disclose your policy, but in this instance you are providing availability sooner than what your policy states. I could see this as a best practice, but if I were the auditor, I would not cite it as a finding since there regulation doesn't mandate that you disclose this.