In the original Tarzan novels Queen La's race is originally from Atlantis. Therefore her counterpart in this show was designed to look like the Atlanteans in Disney's Atlantis: The Lost Empire (2001).
Almost all of the new characters (the Wazari people, Jane's friend Hazel, Nicholas Rokoff, Queen La, the Leopardmen, etc.) were taken from the dozens of original Tarzan books and stories.
This television show isn't available on Disney plus as Disney only have the rights to the movies. They don't have the rights to use Tarzan in television shows.