[A] If you not able to see to "Generate OC" in Sales Quotation that means OC is already created for that SQ
[B] To check this please search that Sales Quotation(SQ) in Quotation module using filters as SQ - SENT - CONVETED TO OC
[C] If the SQ is showing in the result that means Order Confirmation(OC) is already created for that OC
[D] If the SQ is not showing in result and also the generate option not showing in SQ then please contact to our live chat support agent.
Keywords - create OC option not showing in SQ, unable to create OC from SQ