I just realized that Rec. 2020 has been added as a selectable working color space to Camera Raw (v.16.3.1)
Why not add it to Photoshop also as a selectable working space (not present in Photoshop v. 25.9.0). It is a perfect color space for editing for print as it covers practically all printable or surface colors (Pointer's gamut) and is not overly large as Prophoto RGB for print purposes.