The eligibility criteria for MTech is that you must have a valid gate score / the entrance through which the admission is provided and you must have 50% in your graduation BE/BTECH. So if you do BE then also you are eligible for the MTech courses. There is nothing to worry about it.

To know more about the MTech visit the link below:

https://www.careers360.com/courses/m-tech-master-of-technology

I hope this answer helps. All the very best for your future endeavors!