Dear candidate,
Yes , with a CRL rank of  949956 and an SC category rank of 83,000 in JEE Main 2025 , you  have a good chance of getting admission in IET Lucknow through UPTAC counselling. Based on previous years trends , the closing rank for branches like CSE ,AI , ECE and  even Electrical and Mechanical were well above your SC rank . You should definitely apply under the home state SC quota , prioritize branches like CSE , AI  and ECE during choice filling , and attend all counselling rounds .