Hi, I’m the maintainer of Photoscape on Ubuntu.
Photoscape is packaged as a strict confined snap application, which means that it’s running in a sandbox. For example, it cannot access your ssh keys or any hidden folders in your home directory, it cannot access USB sticks without your explicit permission and more. Wine itself is installed inside of this sandbox so it has the same restrictions. The Wine version inside of this sandbox is only used by Photoscape, and it is removed automatically when you remove Photoscape.
I have added wine to the keywords and added the following note in the description of the package.
Note: PhotoScape is a Windows application. This package includes the Wine compatibility layer in order to run PhotoScape on Linux.
There are many wine applications packaged as a snap, because it is a much cleaner and safer solution than actually installing Wine on Ubuntu. Notepad++ is an example of another Wine app. You might want to contact the maintainers of those packages to also include this note in their description.