Genuine question, what were the low code frameworks that were popular in the late 90’s that you’re referencing here?
There was one product really popular then, but forgot the name. Sorry.
A product I personally know is Oracle Designer. This could generate fairly complicate applications (like master-detail-detail layouts) based on the ERD.
Another product I also forgot it's name, was considered very good, but used only within the IBM ecosystem. Fun fact, I was the product owner for a project where the IBM team vastly outperformed the web team (think half the size, twice the speed).