Months of work, but AI has obviously been the biggest enabler here
Gotenberg v9.0.0 is now available 👀
https://gotenberg.dev/
Still the same conversion capabilities, but now with drastically improved conformance level (PDF/A-4, PDF/UA-2, Factur-X, ZUGFeRD, and more).

gotenberg.devA Docker-based API for PDF conversion | GotenbergConverts web pages and office documents to PDF, then remediates, signs and delivers them. Validates any PDF against PDF/A, PDF/UA and Factur-X.