Fortunately, there are quite a few clauses in the original regulation[0], like 31-33, and some clauses in the 50s IIRC, that explicitly mention some of the coercive tactics Apple is employing.

Like leveraging other mandatory services provided by Apple to incur fees.

[0]: https://eur-lex.europa.eu/legal-content/EN/TXT/?toc=OJ%3AL%3...