I don’t think I’ve seen a single isekai protag try to go back to Earth unless you count the “trapped in VR” ones.

It used to be the standard:

• Digimon Adventure (the first series)/Digimon frontier (fourth series)
• Inu Yasha
• Monster Rancher

The only recent example I can think of is Zenshu from last year.

The intrigue is from how a person from a modern nonmagical culture interacts with a medieval magical culture.

Welcome to Japan Ms. Elf might be up your alley: a guy finds out his lucid dreams have actually been him getting isekei’d every night for most of his life when he accidentally brings a friend/love interest back with him. She’s fascinated by modern Japan so they start going back and forth between the real world and magical world together.