Dependent Visa & de-facto Partner

I'm trying to understand if Vietnam allow or anyhow recognizes de-facto partners.

I have received a job offer from a Vietnam company and I'm doing my papers in order to get a working Visa. I (male) have a partner (female) but we are not married.

I know some countries allow de-facto partners to be registered in order to receive a Dependent Visa. Does anyhow have any knowledge or previous experience regarding Vietnam allowing this case?
If not, would the only way out (in this case way in) to get married or there are other options?
I'm asking because I know that Tourist Visas at the moment are halted and perhaps it will be for some more time.

Thanks in advance.
I hope it has not been asked before, I did some research on the forum but was not able to find anything.