Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We hereby consent to the use in this Prospectus constituting a part of this Registration Statement on Amendment No.1 to Form S-4 of our report dated June 21, 2021, except for the effects of the restatement disclosed in Note 2, as to which the date is November 26, 2021, relating to the financial statements of Apollo Strategic Growth Capital, which is contained in that Prospectus. We also consent the reference to

our Firm under the caption “Experts” in the Prospectus.

/s/ WithumSmith+Brown, PC

New York, New York

February 4, 2022