[Python] How get PDF/A compliance with fpdf2

I am able to generate a pdf with fpdf2 but I want it to show up with the PDF/A compliance tag in Adobe Acrobat Reader. Basically i want the below text to appear when the PDF is opened.



Do I need to need to signing to make this PDF/A compliant? Something like:

pdf.sign_pkcs12("certs.p12", password=b"1234")

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