Funding is coming from the EU CEF Transport programme, specifically the Alternative Fuels Infrastructure Facility calls:
Funding & tenders
You can see that the last cutoff for proposals was April, so likely the evaluation process that produced the award would have finalised recently, hence it became public. Typically the time to grant following notification of the award is around 3 months, so before the end of the year, although if Tesla know the money is coming the could typically start sooner
Once the grant is signed, it will appear on this page:
Funding & tenders
Edit: I see
@NicoV found the CINEA evaluation results PDF, which is some good sleuthing, I didn't even realise it was publicly available. More info here:
Transport infrastructure: over EUR 352 million of EU funding to boost greener mobility
And yes, EU has been throwing money at hydrogen since forever, they used to have a Joint undertaking call FCH "Fuel Cell Hydrogen" running, I'm not sure what happened to that though