By following a few links, you can discover related projects (or alternative interfaces to Transkribus). Some are interesting for genealogists and the indexing of personal data in metropolitan France.
https://teklia.com/fr/blog/projet-socface-reconstituer-lhistoire-de-la-france-par-le-bas/
https://teklia.com/our-solutions/arkindex/
https://teklia.com/research/open-source/
etc.