This is almost an impossible question to answer (!) but it might be worth
mentioning Pimcore. This is an open source master data management tool, meaning
that it supports both schema (data model) design and generation/design of UI
elements via a reasonably decent management interface.
It might even be overkill for this particular use case., but from memory the
web UIs that it generates don’t depend on front end libraries / Angular / React
etc & so may work with older browsers.
Perhaps another option is LibreOffice Base?
