Well, 'A Time - Traveling Yankee' is worth checking out too. It delves into America's journey through time, exploring his relationships with other countries in different eras. The author does a great job of portraying America's character and how his modern - day personality clashes and meshes with the past settings he finds himself in.
One great fanfiction could be 'The Pirate's Treasure'. In it, Pirate England and America go on an adventure to find a hidden treasure. It has a lot of action scenes and also some interesting character interactions. For example, their banter while on the ship is really engaging.
The concept of time travel adds an exciting element. It allows for exploring different historical periods through the lens of the Hetalia character America. People are intrigued by how his modern - day traits would interact with the past.
I liked 'America in Panem'. It's a fanfic that shows America being thrown into the Hunger Games universe. The author does a great job of adapting America's personality from Hetalia into this new and deadly setting. You see his struggle with the rules of the Games that are so different from what he's used to, and his attempts to make allies in a place where trust is hard to come by.
I'm not sure of specific fanfics with this exact combination, but you can try searching on popular fanfic platforms like Archive of Our Own. There are often many Hetalia - related fanfics there. Just use the search terms 'Hetalia', 'Russia', 'female America' and 'pregnant' to narrow down your search.
One great fanfiction is 'Fem America's Journey Across the States'. It delves into how Fem America interacts with each state in unique ways. The characterizations are really interesting, and it shows a lot of the cultural diversity within the states through her eyes.
One great Tomione time travel fanfiction is 'Time's Arrow'. It has an interesting plot where Hermione travels back in time and meets a young Tom Riddle. The story is well - written, with detailed descriptions of the Hogwarts of that era.
There's also a fanfic called 'Levi's Time - Hopping Adventure'. In this story, Levi accidentally time travels to different eras and has to adapt quickly. It's full of action and his reactions to different time periods are quite amusing. For example, when he ends up in a more modern era, his confusion about technology is really fun to read about.
One great hiccup time travel fanfiction is 'Hiccup's Time - Twisted Tales'. It takes Hiccup on an adventure through different eras in the Viking world. The author does an amazing job of weaving in the unique elements of the How to Train Your Dragon universe with time - travel concepts.
There's a fanfiction that focuses on Piper traveling back in time alone. It's called 'Piper's Time Leap'. It's really interesting because it delves deep into Piper's character and how she uses her powers in a time where the rules of magic are a bit different from her own time. It also has some great emotional moments as she misses her sisters and tries to get back to them.
I really like 'Time - Hoofing Through Equestria'. In this fanfic, Rainbow Dash accidentally travels through time. What makes it stand out is how the author portrays Rainbow Dash's confusion and then her determination to get back to her own time. There are some really cool interactions with ponies from different time periods, and the descriptions of the various landscapes in different historical Equestria are quite vivid.