Hey - I'm the finance lead at CEA, of which EA funds is one part. Anyone can donate to EA Funds, and you should be able to do this from Germany. Are you concerned that doing so means you're not donating tax-efficiently since the funds aren't registered charities in Germany?
If so, my colleague Sam wrote this post arguing that donating effectively might mean ignoring tax efficiency, and I agree, depending on your alternative.
For example, if you were planning to donate only to AMF, and if there was a German AMF you were planning to donate to (I don't know if there is) which would you give tax deductibility, then I think it's better to donate to the German AMF and get the tax deductibility.
But if you were comparing a general charity that would give you tax deductibility in Germany, and if you thought the EA Funds option (e.g. the Founders Pledge climate fund, the Long-Term Future Fund) was >50% better value for money than your alternative in Germany, then my view is that it'd be better to just lose the tax efficiency and donate directly.
If I remember correctly, German law requires that the charity that writes the donation certificate has control of or at least documents how the donations were invested. (Not sure which of the two requirements it was.) I think that is why the forwarding to the EA Funds had to be discontinued. The EA Funds pool all the donations and then allocate them at their discretion, so it’s not possible for the German charity to control how the donations are used, and it’s probably difficult or impossible to know what project was supported to what degree by which donation.