I do know that a new Bible was made in the old fashion by some monks a few years ago; it came as part of an exhibition to a monastery nearby where we used to live. It was very impressive. As I recall, it was quite expensive and took nearly a decade to produce. So yes, it is still happening, but it’s exceedingly rare.
There are artists in Etsy who are creating one-offs, but that’s different than a whole Bible or psalter.
@francis I do believe that the Benedictines of St. Cecilia's Abbey in Ryde, England still make their own manuscripts for Chant. Here is a link to some they sell. But I have also seen some pictures of them with actual chant books written out by them. https://stceciliasabbey.org.uk/shop/calligraphy/
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