Yes, I went back last week and my mum passed me my letters. If I can recall it correctly, I did see it in my physical statement. Will pay more attention next time.
It will not appear even in e-statement and I thought e-statement is supposedly the same as physical statement.
Nope, no luck as well.

Yes, annoying and confusing. Now I only know I will need to pay my insurance but no concrete proof that I have paid for it. Nothing shows on my breakdown.

Unfortunately, you can only see in physical statement, I will pay attention to mine in the future or you have to inform your merchant to charge it to your new card.

I'm planning to inform my insurance agent... Else I can go crazy calculating myself but luckily my spending on OCBC is not much.