This is what we can read in the 3.1 version history:
After updating Dorico to 3.1 I looked at both Bravura and Bravura Text on my system and they show Version 1.310, the files are from September 2019
The Bravura json file is from 15 january 2020
The three Petaluma fonts and the Petaluma json file do not seem to be new and are also from September 2019.
Which version of the fonts should come with Dorico 3.1?
And how to install them?