Page list won't recognize page type from project subsite (multi site)

In a multi site environment a page list on the subsite only lists page types from the Default Site Type.

Project Site has page type ‘Page Project’ and creates pages of that type.
Page List only sees the page type ‘Page’ (Pagina).
And in consequence won’t show any pages.

Also can’t edit page type templates from a subsite.
Only original (Default) Page type templates are editable.

Bug / or solution available?

Both screens are from the same subsite:

This is suppose to be “Page Project” but only shows ‘Page’ (Pagina)

v9.3.5