I wouldn't worry about that. Tiobe simply measures how many search queries are made for some terms supposed to represent a programming language, and even that process is still inaccurate (e.g. because of ambiguity with other uses of the same terms). The result says nothing about how widely the language in question is actually used. There is no reason to assume a correlation between effective prevalence and the number of searches. Experienced developers are unlikely to enter the terms used by Tiobe into a search engine, and since most people are now working with LLMs, this measurement method is obsolete even more.