Trophies from previous events?

[LeyendaV]

Is there a way to unlock these display objects?

https://phasmophobia.fandom.com/wiki/Special_events_and_challenges

[cnnrde]

I'm not sure - I had a brief look in the past but didn't find anything interesting. I'll have another look

[LeyendaV]

The other items you don't own (like the bones), don't show either. It's like the things you don't have are hidden, or directly not saved into your file, till you get them.