Wasn't this called out repeatedly over the years and obvious from the start? That a double forum shopping model will produce paperwork and voluntary compliance, in cases where the offender literally didn't know they were misbehaving, but little real action?
[1] https://www.heise.de/news/Kein-Bussgeld-fuer-die-Datenpanne-...
This is the problem of German regulators being too cozy with incumbents. (Also see: Wirecard.) It's related, in that if you're one of the incumbents a regulator is cozy with, you're going to fight to switch forum to Germany. But it's a different problem with different solutions.
https://techcrunch.com/2021/12/20/facebook-transfers-impact-...
https://noyb.eu/en/irish-dpc-burns-taxpayer-money-over-delay...
(DPC = the official Irish body who should be responsible for enforcing GDPR… in bed with Facebook instead. Somewhere between shameful and criminal.)
Speaking as an Irish person, it's probably more accurate to say that the DPC is woefully under-resourced, and FB are super litigious so its more the government haven't given the DPC enough resources to do their job.