The Security White Paper is from April 2021:
Security White Paper - Passbolt Pro Edition (April 2021)
This is probably because the core of Passbolt hasn’t changed much throughout the years.
But the white paper does seem to need an update. Elliptic Curve algorithms is eg. stated as not being supported - but they were supported in 2022.
The White Paper is rather important when considering purchasing the Business/Enterprise edition as internal IT Security departments read it thoroughly before approving the purchase.
Please consider updating the Security White Paper.