Budding Horizon collector here
- found this post while looking for an HFW press kit (which as you say sadly doesn't seem to exist).
Here are a couple more HFW merch posts I was able to find on social media.
Huge merch assortment:
And a closer look at the backpack:
Source on Twitter
Three of the four T-Shirts and the water bottle seem to be retail merch from the Sony Gear Store. But the hoodie and rain jacket should be exclusive influencer/press gifts.
Another influencer haul from
here:
No new items, but it's interesting how the types and numbers of goodies vary between influencers.
And
this one might be the most complete haul, yet:
Looks like it came in a neat box.
Also managed to find a few videos:
Some backpacks and other items also have found their way onto eBay and are fetching pretty crazy prices:
This description says that they were given out to Sony associates to commemorate HFW's release.
And finally, I managed to find this overview on the manufacturer's site, showcasing most of the merch, with the exception of some preorder bonuses:
Happy hunting!