Hi there,

Yes ,you can participate in second round of counselling if you didn't get any seat in 1st round.

Eligibility criteria for participating in 2nd round of counselling is following:

Candidates who didn't get any seat in round 1.

Candidates who have registered themselves and secured a seat but their allotted seat got rejected during verification of document in 1st round.

Candidates who choosed option of seat upgradation.

For more details follow this link: https://www.google.com/amp/s/medicine.careers360.com/articles/neet-counselling-faqs/amp

Hope it helps you

Good luck!