"Mereka meminta dukungan saya."

Translation: They ask for my support.

[Flanders1]

Why can't it be 'They are asking for my support". It's a better sounding sentence in English

[Kanrei]

Why can't it be past tense here?

[Rick392366]

Why can't it be past tense here?

It can be past tense.
Please report it , so that they can fix it.