That may well be the intent but I highly doubt that Singapore is in any position to pull that off. The US simply has too much leverage over Singapore - both in finance, where Singapore's economy is highly tied into the western financial system and defence, where the SAF is highly dependent on western and US hardware.
Case in point, the unilateral sanctions by Singapore over Russia in 2022. Totally unnecessary but yet done nonetheless. Singapore's financial wealth is significantly based on wealthy foreigners "parking" their wealth in the Singapore financial system. Previously, these funds were primarily from regional ASEAN wealthy but over the last two decades have come from further afield including Russian oligarchs. Neutrality in spite of global events is critical to any wealth hub.
So why would Singapore "unilaterally" announce a sanction package that includes financial measures against Russian banks and (unnamed) entities? While the effect of this sanction package remains to be seen, the move is nonetheless counterintuitive to what is required to remain a viable wealth centre and will most certainly have an impact in the competition for Russian wealth outflow viz the middle east which is currently making hay.
My 2c take on the above is that Singapore was coerced to make a symbolic act that will prompt other ASEAN nations to fall in line with the "coalition of the willing"

but that fell flat since no other ASEAN nation crossed the line.
Back to a Indo-Pacific conflict - so whether Singapore will be "allowed" to remain neutral is highly dependent on USN basing access in the area. If Subic is back online, then SG will likely be allowed to remain neutral. If Subic remains offline and the USN needs something, SG is it and the rule of "with us or against us" will force Singapore's hands.
Great power politics. Everyone else is a pawn, no more so than a tiny red dot that may have once punched above it's weight with LKY at the helm but probably should know better that world events have overtaken it.