Why would my ex unblock me after 3 weeks?

We broke up one month ago, he blocked me on Facebook and WhatsApp. A few emails were sent back and forth regarding some of my furniture.
A few days ago he unblocked me on Facebook but no contact.
I don’t chase, I don’t contact unless it is super important.
Why would he unblock me? We did not end on good terms. Just wandering from a guys point of view?
Why would my ex unblock me after 3 weeks?
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