I've been in a similar position, a couple times in my career. I think its a natural trap to fall into when you are the kind of person that is good at bootstrapping projects to the point where they need a team to grow further, but not interested in management.
A newsletter article (not mine) that helped crystallize my thinking around this, and helped me to explain it to non-technical folks in my current organization is this one: https://newsletter.pragmaticengineer.com/p/engineering-leade.... Unfortunately its pay-walled, but Gergely (author) put some of the content in a tweet thread that is worth reading (https://twitter.com/gergelyorosz/status/1473353064358756352). If you look at the venn diagram posted in that thread, it sounds like you fall squarely in the "beware!!" zone.
If you are like me, you fall into that zone, at least in part, because you are clinging to the some technical duties that you could give up, but since they are the foundation of why you enjoy your job, refuse to do so. Understanding this and your own strengths and weaknesses clearly, can really help frame possible solutions for you. I would spend some time reflecting (and it sounds like you already have) about what you want out of this job and your career in general.
Perhaps you can propose to your management that you want to move into more of a "staff engineer" role. This may or may not work, and in the end, depending on the management at your company, you may have to move on to find what you want, but being clear about what that you want, is the first step in that direction.