Don't need to wait for email. You can fund in SGD$1k the moment you get your account number.

But the most important part of the entire process? It's your e-KYC verification.
Make sure to link your Singapore account in your Malaysia CIMB Clicks - once linkage is done, you will see your Singapore account appearing under "My Accounts".

That's when you can initiate another self-verification e-KYC transfer (minimum 1 SGD). Go to Transfer Money (LOCAL) and you'll be able to select your Singapore account as recipient. Towards the end, it should say something like "ASEAN Transfer, 0 Fees".

More details:  step-by-step blog post on opening CIMB SG account

I think there was one forummer here recently whom saw the clauses (tho I'm honestly couldn't remember if that thing was there before or not). But so far I still see new applicants getting their account past few days

Just give it a try and let us know how it goes