Hello Aspirant,

Don't worry because class 11th details are not mandatory to fill in NEET UG application form because it is an optional section so even if you have missed it then also it won't impact your application. However class 10th and 12th details were mandatory so you must have filled it in order to proceed further. 

As you are preparing for NEET 2022 for which around 2-3 months are left from now so now you should focus on more and more practice of different types of questions. 

******* Practice previous year's question papers and sample papers as many as you can because it will enhance your self-confidence and time management skill   
https://medicine.careers360.com/articles/neet-sample-paper
https://medicine.careers360.com/articles/neet-question-paper

You can also solve the Test series for NEET UG 2022 for better finishing of your preparation, you can get the Test series from the link given below :-
https://learn.careers360.com/test-series-neet-may/

I hope this information helps you.
Good Luck!!