Singapore move. Help DP pass please

[Newbii]

Hi all

We are looking to relocate to Singapore for a few years from the UK in August pending my husbands EP approval. Due to speed of move we are set to get married only a couple of days before we go. This means I won’t have time to get approval for my DP. Do I still go on a tourist visa whilst I wait for approval of DP? Will I need to show proof of a return flight to immigration when I land? Thank you