mnl - sg - bkk (multi-city travel)

hi! my friends and I are going to SG for a concert this March 2024. One day lang kami sa SG and will go back to the airport na after the concert to catch our flight to BKK.

Will the IO (MNL) still require us to present any hotel/accommodation proof even if one day stay lang yung stay namin SG? Also, ano yung mga need namin i-prepare to face yung IO sa SG for our 5-day trip in BKK (as not SG locals)?

thank you!!!