Dear aspirant hope you are doing well. It's difficult to predict because cut keep changing every year depends on various factors like no of seat available , difficulty level of exam and noo of student appear in exam.

As you secured 923 St rank in jee mains. Yes you have fair chance to get IIIT LUCKNOW as

• closing rank for Computer Science for St category is 2564 in 2021.
• closing rank for Computer Science and Artificial Intelligence for St category is 2491 in 2021.
• closing rank for  Information Technology for St category is  in 3639 2021

You can check the cut off using the link given below..

https://engineering.careers360.com/articles/jee-main-cutoff-for-iiit-lucknow/amp

yes you can also have chance in MNNIT Allahabad

JEE Main 2021 Cutoff for MNNIT Allahabad

• Civil Engineering - closing rank for sc is 2946
• Electrical Engineering - closing rank for sc is 2039
• Computer Science and Engineering - closing rank for sc is 881

You can check the same at our site..

https://engineering.careers360.com/articles/jee-main-cutoff-for-mnnit-allahabad/amp

For best results, please must use jee main college predictor tool, so you can get best college according to your rank and category.

To know the list of engineering colleges , you have chances to get admission, you can also use JEE MAINS college predictor tool. Link is given below..

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Pervious years percentile to qualify the jee advance is given

General : - 87.8992241 percentile

EWS:- 66.2214845 percentile

OBC-NCL :- 68.0234447 percentile

SC :- 46.8825338 percentile

ST:- 34.6728999 percentile

PWD :- 0.0096375 percentile

you can use this cut off as a reference for jee advance 2022. you can also check the same using the link given below..

https://engineering.careers360.com/articles/jee-main-cutoff

Hope it's helpful thank