The Vietnamese film Thua Me Con Di (2019) was shown in the U.S. with the title Goodbye Mother. It was directed by Trinh Dinh Le Minh.
It's a coming-out film about two Vietnamese men. One of them, Van, is the oldest grandson. He has returned from the U.S. for an important memorial service for his grandfather. (Van is portrayed by Lanh Thanh.) His partner, also Vietnamese-American, is Ian (Vo Dien Gia Huy Vo).
Van is slow in coming out to his family, but his grandmother (Nsut Le Thien) understands that the two men are gay. The men look enough alike to confuse grandmother, and she bonds to Ian, not Van. But, she knows what's going on.
This movie would have worked well as I've reviewed it above. However, director Trinh Dinh Le Minh has added a subplot full of family melodrama. I haven't seen enough films from Vietnam to know if this drama is expected of any movie, even a relatively light comedy. However, the subplot skews the story away from its basic plot--coming out in a traditional family.
We saw this film as part of Rochester's important ImageOut LGBTQ Film Festival. (Virtual this year.) It has a strong IMDb rating of 7.5. I thought it was even better than that, and rated it 8.