This isn't uncommon at all and is nothing to be concerned about.
My husband and I both applied for naturalization on the same day in October 2022. I had my interview and oath ceremony in January 2023. He waited until April 2023 for his interview and oath ceremony.
I ended up chatting to the person in front of me in the line for my appointment and they also had the same experience, filed at the same time as their spouse but only he was called for interview and his wife was still waiting.