My partner had funds in his account for 2.5 months and it was ok, applied Hanoi. Search the group at the top for “500k” as someone was just approved in Jakarta with funds in for 2 statements. In London some approved with funds for days / weeks. It depends, but it’s a risk if funds are in under 3 months. But if you have a strong financial position it’s possible, strong income, add savings, investment statements etc, you need to demonstrate tour story simply so they can understand. Or get a sponsor letter from someone saying they will be financially responsible for you and add 3 months of their bank statements with a strong balance.
Jakarta, Hanoi, HCM still seem to be the best places.