Hello all, good day to you

!
Would appreciate if someone could evaluate my chance of PR application.
I applied in January 2020 (my first application) and did not receive any news from ICA until December 2020 which requested me to provide additional documents to prove that I am of Chinese descent. And there was no news since then.
I have a SC girlfriend and we plan to get married in Singapore next year. I plan to settle down in Singapore with her.
My profile below:
Age: 28
Gender: Male
Race: Myanmar Chinese
Nationality: Myanmar
Education: Bachelor degree from UK university, currently pursuing Masters in Computer Science from a top US university and would graduate next year 2022
Job: Working in one of the biggest Fin Tech companies with technical role
Length of stay in Singapore: About 4 years (almost 2 years with current company)
Salary: 70K, 80+K with bonus
Pass: EP
Languages: English, Myanmar, Chinese
I also would like to ask, if my application is rejected, would next year after I have graduated and married would be a good time to apply again?
Thank you so much!