Hello,

As you have assigned the College but you have not reported in that , thus you can participate in the mop up round of the counseling process.

Candidates who get admission in the 1st and 2nd Round of NEET 2020 counselling are also eligible provided they have not filled the retention form.

In any state, irrespective of their domicile, NEET eligible candidates can participate in the mop-up round against the vacant seats reserved to states through 15 per cent quota.

• Online Registration for MOP up (3rd) Round will start on January 13, 2021.
• The result of Mop Up Round will be declared on January 20, 2021.

https://medicine.careers360.com/articles/admission-ayush-courses-through-neet

You can refer to this link for more information

Hope this helps!!