When I see low-code, I find myself looking for the Visual Basic of Web. If I could drag and drop a few pre-made controls (including a database control), double click to handle a few events, and have a CRUD app, I would be thrilled.
Unfortunately, I still have not found that yet.
You might want to give a try to windmill. open-source, self-hostable FaaS and app builder similar to retool.