How to check how many remaining economy saver seats are available when redeeming miles?

Pardon me as i’ve not actually redeemed flights before in SQ and no information comes out online despite googling.

For context: My partner and I are planning to redeem the same flight separately for a one way ticket in late October. However, the concern is that we only have enough miles for a saver ticket each, so if there is hypothetically only 1 saver ticket available, the other wouldn’t be able to afford the advantage rate.

Is there a workaround on how may I ensure the number of remaining saver flights are at least two or more? Is the norm such that saver seats almost always only have one left or it’s not too rare to have two or more left still?

Thanks in advance!