@cyberspeed: You can try to search in the libUE4.so library for engine references (like "release" or "build"), but usually it is not mentioned explicitly. The better approach is to open a UE4 package in umodel and take a look at detected package version in the cmd window - version 8 is used in 4.22-24, 9 in 4.25, 11 in 4.26.
@C0r3: Well, since PC version of PUBG Lite is now discontinued, I think it's possible to answer some related questions, since situation will not change in the future.
1) The mentioned script should be valid even for latest versions, which are around 1.4.2. Extraction rate can be less than 100% because the rest is table of contents from the same file (more files -> bigger TOC -> less actual data). If quickbms doesn't through a error that means all is fine. If the script would be incompatible with packages or they would be encrypted, you couldn't extract even a single file from them. But I've updated it in the specific scripts bundle and it can now handle base paths properly, like other latest scripts - it may potentially fix some stuff, since UE4 (and umodel) depends of paths while exploring assets. So it's better to re-extract all assets with the updated script.
2) Even though models related questions should be addressed at proper place with proper samples (at umodel forums, since it's UE4 game), I'll save some time and answer here. If some animations works and some doesn't, that doesn't mean they are broken - they're either using unsupported curves compression or they're additive (which are not full animations, but additions to existing ones), which is not supported by any existing tools. As for meshes, the game is using the same approach for some static meshes as mobile version, so this build
works fine for them. Though due to different control flags in meshes from PC version, the specific build will work only for static meshes with ubulks, the rest should be opened on official umodel build. Not sure if it will be fixed in the future.
You can request AES keys on rin forums
(the list with keys is also there)
AES keys finder and latest UE4 bms scripts: in this post