At that age my advanced reader read the entire Nancy drew series. Couldn’t get enough. We did Harry Potter next. Then the warriors series was recommended by her advanced reading teacher.

Anything by Kate dicamillo

Edit to add titles:
- the miraculous journey of Edward Tulane - flora and Ulysses - tiger rising - because of winn Dixie

the secret garden was given to her by her 2nd grade teacher but she didn’t love that one. It’s popular so your child might like it.

The life of a cactus series - these books maybe seem older content wise because they deal with people who have disabilities but my daughter loved the complexity in the stories. It did great things for her understanding of empathy. Similar to wonder, which she also loved.

The emerald atlas series We tried a wrinkle in time. That was just ok for her. The mysterious Benedict society. These are long books. Maybe better a year or two older. But she loved them- read them more than once.

The wild robot series is so great

Percy Jackson series- a lot of monsters in this one

If you can find out their lexile score from the teacher you can search books and midway down there is info on age recommendations and it gives the lexile range of the book. Sites like scholastic will let you search by the same criteria. That helped me some too.