I got 304 marks in the UPSEE. My rank in general category is 9458 and in girl's category, it is 1239. Can I get admission at IET Lucknow or KNIT Sultanpur in either electrical or electronics branch?

Considering your UPSEE rank in the girl category, I think you should get easily in KNIT Sultanpur. Mostly even a seat in IET Lucknow is possible.

The girls above your rank must be trying multiple other entrance exams as well and there is a maximum possibility that half of them will go to IITs or NITs. Your rank is very good and girls above you are more capable on average.

UPSEE Cutoff Round (General Category) –

Don't worry I think you should get one among the mentioned seats. Good luck!