Is “The three national masters of the Chechi Kingdom are purely fictional monsters invented in Journey to the West.” true?

In Chapter 046 of 'Journey to the West', it is described that the state preceptor of the Chechi Kingdom, the Great Immortal Tiger Strength, was originally a yellow-haired tiger spirit capable of summoning wind and rain, and even gambling on decapitation. Neither history nor Daoism records such a beast demon serving as a state preceptor and contending with Buddhism. Original text: "大国师砍下头来，不能长出，死在尘埃，是一只无头的黄毛虎。" (Chapter 046 of 'Journey to the West').