I have no connection to the Catholic faith and its practices and don’t know a lot about Catholic saints.

But I just want to note that that since today there is a canonized Catholic saint who provided lists of of Marian apparitions and Eucharistic miracles he catalogued himself as #OpenData on the Internet.

https://en.wikipedia.org/wiki/Carlo_Acutis

The catalogues are not yet 5 ★ Open Data https://5stardata.info/en/ but it‘s a start.