Hii Riya!
Yes, cockroach, frog and earthworm are there in the syllabus of NEET UG 2020. It is often a confusion among the candidates every year regarding these topics, but every year these are there in the syllabus. You can also check previous year question papers to see the presence of questions related to these topics.  Click on the following link for more details -
https://www.google.com/amp/s/medicine.careers360.com/articles/neet-syllabus/amp

Hope this helps.
Good luck!

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