If you want to go for the course of Engineering, then you can't appear for the UPESAT examination as for UPESAT the upper age limit is fixed. For 2021, the age limit was that student born after or on October 1, 2000 are eligible. So as you can see that the upper age limit is around 21. As you have crossed the age limit you can't appear for it. But you can always apply for state Engineering for which in most of the cases there is no age limit.

Apart from this you can take admission in BSc courses as well or if you have done Diploma in any of the engineering stream then you can consider to go for the Lateral Entry BTech admission, in which you will be provided admission directly to the 2nd year of BTech/BE.

I hope this answer provides you some insight. Wish you a great eve!