Let's share my personal used keyboard shortcuts visualiser for Affinity Designer. As you might have guessed from it's name, this tool shows up the AD shortcuts in a more direct virtual keyboard style manner, locally in your web browser.
For adjustments just select or switch to the corresponding option setting on top of the page view for your AD version (actually included are English and German shortcuts for AD v1.5.5). Select your OS (Win or Mac) and the localized keyboard layout you use:
You can also search for shortcuts via the bottom search field:
To run it locally, extract the compressed archive and navigate into the "/DesignerShortcutMapper" folder. There open the HTML page index.html in your default or prefered web browser, that's it!
Here attached is the compressed DesignerShortcutMapper.zip archive:
DesignerShortcutMapper.zip
Have fun with it!
See also this related posting.