Hello aspirant!
Hope you are doing well.

Cutoff depends on many factors
Number of candidates
Difficulty level Etc..
So this year it was a difficult paper, but students managed to get good marks and cutoff is nearby same as previous year despite of a difficult paper.

So Kerela last year's cutoff for ST category was
Air 2124748 for government college

You can check if your rank is nearby this or not to get a medical college

Here is some information on Kerela Medical colleges, you check the link below:
https://medicine.careers360.com/colleges/list-of-medical-colleges-in-kerala

You can also check your admission chances in MBBS by using the college predictor tool:
https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp

Hope this helps you.