Tool to see one big friend wishlist?

SG Community = Friends?
Giveaways - Wishlist -
https://www.steamgifts.com/giveaways/wishlist

Recently, I feel that there are fewer and fewer things that collect and display non-public information due to privacy-related laws.
I think there used to be.

You are the of the GROUP.
Your friends are using SG.
Your friends are publishing information.
If you meet these requirements, you can use the Wishlist view in the GROUP section.
https://www.steamgifts.com/account/steam/groups

[Example]
http://www.steamcommunity.com/gid/103582791432125620
S.Gifts
https://www.steamgifts.com/group/SJ7Bu/steamgifts/wishlist

I don't know about friends on Steam, but there is a tool to view what games are wishlisted by the users in your whitelist here on SG if that helps at all.

https://www.steamgifts.com/discussion/TSa4B/userscript-whitelist-wishlist-and-tools-updated-april-14-2018

Steam itself had this feature, under the "most wanted" tab here.
But it's been broken for years now and they've no interest in fixing it.