Lua and LuaJIT compatibilities

LuaJIT is compatible with Lua 5.1  [https://luajit.org/luajit.html]

luajit2 (part of openresty) is compatible(https://github.com/ac-custom-shaders-patch/acc-lua-sdk/) with Lua 5.2 ????

What about Lua 5.3 and modern 5.4 (https://www.lua.org/versions.html) ??? Does it exist luajit_3 and luajit_4 ????