Does this board necessarily need a BIOS update for an i7 13700K of the 13th generation? I have sent the board to support as the CPU is recognised in the BIOS but always idles at 90 degrees and the red CPU LED is permanently lit.

PS: Please give me some feedback on this...

Yes

Yes,
I have installed an i9-14900KS

Yes

Ja. Intel Core i der 13. und 14. Generation.