No, I do not think that you will have any problems after completing BTech from LPU. Colleges are required to have AICTE approval when the course is run by themselves. As LPU is a university that is recognised by the UGC, AICTE accreditation is not required.
BTech course from LPU is completely valid with graduates working in more than 1800 companies worldwide. The university has also collaborated with top companies like Google, Microsoft, Intel, Dell, Cisco and more for industry immersion.
BTech CSE is one of the best-performing courses at LPU which has recorded more than 900 recruiters with more than 2000 offers. So, it can be concluded that pursuing a BTech from LPU is worth it irrespective of the AICTE approval.