Dear aspirant hope you are doing well, yes IGNOU is approved by UGC. The certificate is also accepted  in upsc and CAT exam.

IGNOU Degrees/Diplomas/Certificates are recognized by all member universities of the Association of Indian Universities (AIU) and are at par with Degrees/Diplomas/ Certificates of all Indian Universities/Institutions, as per UGC Circular letter No. F.

Accreditation & recognition

(IGNOU) has been granted the authority to confer degrees by Clause 5(1)(iii) of the IGNOU Act 1985. IGNOU is also recognised as a Central University by the University Grants Commission of India (UGC).

hope it's helpful for you

thank you