Regression does not equal baby. Regressing is not always bottles and sippy cups and pacifiers.
I think it's easy to feel like you're doing it wrong sometimes, to feel frustrated, in a community where younger regressors are the norm.
You can regress to any age or age range. Baby, kid, teen, young adult, or even a mix of them. You're not doing it wrong. And you don't have to make yourself fit into other boxes that don't fit you.
Your experience is valid, regardless of what's common to see online.