Do you still have another Mac with macOS 10.14 Mojave or earlier?
If you still can run Aperture on another Mac use it to prepare the library for the migration to another app.
This can help to migrate your Aperture adjustments to a different application, if the app cannot replicate Apertures adjustment. Then the previews created in aperture will be all we have to migrate the edited versions. If you wanted to save storage and have set Aperture to use small previews, you will have a problem. If you can, run Aperture again on your library and let it render previews for all edited photos in the original size. Also you may want to use the opportunity to convert all media in a legacy formt to a format will be supported on macOS 10.15 or later. macOS 10.15 or later does no longer include some older lIfe frameworks that a re necessary to play some older video formats. (About legacy media in iMovie for macOS - Apple Support)
On a Mac with macOS 12 or earlier it is still possible to use the Photos.app to create a new Photos Library from an Aperture Library. This will save all albums and folder and projects, so we can preserve the structure of the library. But the more recent versions of Photos can only import selected media from an Aperture Library, but not the structure of the library. Migrating an Aperture Library to Photos as a Library is no longer supported on macOS13 Ventura - Apple Community