My approach was two-fold. One aspect consisted of rethinking "when" & "what" type of content is shown to the user. The other aspect is "how" the user consumes the content and "why" they would interact with content in that manner– given the context of a lockscreen. You shouldn't force engagement, but foster natural interest and curiosity to showcase the capabilities and utility of the Windows Ecosystem.
Users opening their device, checking the time or notifications at a glance.
Instead of showing users clickable content related wallpapers/suggested features, tailor relevant content to foster natural and user-initiated engagement in Microsoft services.
When the user opens their device, use location, time, calendar, habits, purchase history, and connected Microsoft services to show content at the most optimal times for the user. Build upon existing feature but execute a bit of restraint – as to not frustrate or annoy the user.
Limit hotspots to a singular area. Too many hotspots and notifications can lead to visual clutter and confusion.
Don't force engagement. Make things usefully apparent, bringing utility to their fingertips, naturally drive engagement to services/products.
The lockscreen in inherently visual. Utilize a full-screen, immersive experience to help drive concentration and engagement through delight.