Do you think the original story is in public domain?

This is something that I have been wondering for years, but do you think the original story that was written by Waldemar Bonsels have entered the public domain after he have died in 1952? Before Nippon Animation adapted the story into an animated series in 1975, there was a film adaptation that was released in the 1920s that "starred" real insects which predated the famous animated series by 50+ years and there was also an opera stage adaptation that was made in 1963 which also have predated the animated series. There were also some adaptations that were originally planned to be made, but they ended up being scrapped like a German animated adaptation that was planned to be released somewhere in the 40s as a German counter product to Walt Disney’s Bambi and they have commissioned Waldemar Bonsels to write a screenplay to it back when he was alive. In 1938, Walt Disney asked to Waldemar Bonsels if he is allowed to make his own animated adaptation of his book, but Bonsels refused to accept his plan and didn't gave him permission to adapt it which this info came from an article to one of the books that I have. I also have noticed that there are a lot of theatrical/stage/musical adaptations that got made nowadays probably because the story have already fallen into public domain in Europe, but not in America yet because it was mentioned in the "2023 in public domain" article on Wikipedia that it will became public domain on the next year in America, but I think the story is already in public domain after so many years because the story itself is already 100+ years old. I hope after the story became officially public domain, I hope the first non-Nippon Animation/Studio 100 adaptation will be an animated movie or show and not a horror movie like what happened to poor Winnie the Pooh, but I know that a lot of fairytales, folktales and fables have got this "horror movie" treatment, but I hope this isn't happening to Maya the Bee too.