If the approved credit limit is not enough to cover my upcoming order, can I request for a larger credit limit for cover?

Small Business Policy (SBP) / Self-Underwritten Policy (SUP):

Yes, you can apply for an increase in credit limit anytime.

Online Micro-Business Policy (OMBP):

Yes, you can apply for an increase in credit limit once within the credit limit effective period. Application must be submitted within 60 days from the credit limit effective date. Additional premium will be charged upon the increase in credit limit amount.