Hello Aspirant,
No there is no any special round for the allotment of preparatory seats. You have to under the entire process of JOSAA counselling to get even preparatory seats and also note that only your Preparatory rank does not ensures your preparatory seat allotment but you should have decent preparatory rank like if you belongs to SC then your preparatory rank should be under 500, then only you can expect some good IITs.
From today the registration for JOSAA counselling will be started and the complete process for registration for JOSAA Counselling is mentioned below :-
For complete details about JOSSA Counselling process kindly check out the link given below :-
https://engineering.careers360.com/articles/josaa-counselling
To have a list of all those colleges which you can get based upon JEE-Advance 2021 score you can use JEE-Advance College Predictor:-
https://engineering.careers360.com/jee-advanced-college-predictor?icn=QnA&ici=qna_answer
JEE-Advance 2021 cut-offs are mentioned below :-
>>> Common rank list (CRL) - 10.0 (Minimum percentage of marks in each subject) - 35.0 (Minimum percentage of aggregate marks)
>>> GEN-EWS rank list - 9.0 - 31.5
>>> OBC-NCL rank list - 9.0 - 31.5
>>> SC rank list - 5.0 - 17.5
>>> ST rank list - 5.0 - 17.5
>>> CRL-PwD rank list - 5.0 - 17.5
>>> GEN-EWS-PwD rank list - 5.0 - 17.5
>>> OBC-NCL-PwD rank list - 5.0 - 17.5
>>> SC-PwD rank list - 5.0 - 17.5
>>> ST-PwD rank list - 5.0 - 17.5
>>> Preparatory course rank lists - 2.5 - 8.75
You can also use JEE-Main College Predictor to predict your chances of admission in different engineering colleges of India on the basis of your JEE-Main 2021 result :-
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
I hope this information helps you.
Good Luck!!
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