Any Transmigration Novels Set in the 1960S or 1970S, with Either One Female Lead or a Widowed Female Lead?

I've read too many stories about people who transmigrate to the 1960s and '70s. Why do they always have male leads? Can't the heroine be unmarried, or have become a widow early on? Later, either she depends on the male lead or spends the whole story fighting terrible relatives. I'm really tired of it.