That is a start at least. International copyright of course is a complete mess and it is not obvious exactly what expiring copyrights in one country means elsewhere. J.R.R Tolkien's copyrights are listed as expired now in New Zeeland and a few other countries, but will remain in copyright in most countries for another 20+ years. Guess in NZ and the few other countries with life+50 copyright they can enjoy making their own new LoTR games or whatever, but they have to carefully limit distribution to not violate copyrights elsewhere? I think there were some issues like that a few years ago when Ian Fleming's copyrights expired in Canada and someone made a Bond movie or something that was illegal to import to the US?
Mickey, Disney, and the public domain: A 95-year love triangle
Public Domain Day 2024 Is Coming: Here's What to Know
Etc