Looking at this list, at least with respect to the US patent family members, only 5 of the US patents are still Live and in-force at the USPTO:
It looks like the last of these is set to expire at the end of January 2026.
Looking at the ffmpeg logs, it looks like EAC3 support was already committed before that last patent's priority date, so it is probably not essential to the decoder and only covers some additional feature or optimization. Or at least if it is essential to the decoder I don't see how you could enforce it since you could point to obvious prior art (e.g. the various decoders existing before its priority date).
That patent list
also includes Dolby TrueHD patents.
Maybe I shouldn't have posted this list in the first place, because people are combing over the list despite the fact we don't know which of them are for Dolby TrueHD (and hence can be safely ignored). I mentioned it as a source due to how few other sources exist (only the ETSI declaration from 2004).
I find it weird that a codec that is essential for viewing TV in a country as big as France receives so little attention when it comes to its patent status.