Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

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We consent to the incorporation by reference in the Registration Statements on Form S-8 (File No. 333-261879 and 333-257161) and on Form S-3 (File No. 333-276668) of Hanover Bancorp, Inc. of our report dated March 13, 2026, related to the consolidated financial statements Hanover Bancorp, Inc. and Subsidiary appearing in this Annual Report on Form 10-K.

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