Someone saw my post and answered my questions in Universe chat. I'll summarize the answers here for anyone else who has the same questions in the future:
(1) It is only possible to view what another player wants to display in their profile. Some people put information in their profiles and some use the roleplay forum to tell their homin's story.
(2) People generally use the Universe chat to announce what they're selling and buying. There's not a way to search all merchants.
(3) To access the furniture in your home, in-game do the following:
1. Shift + W
2. Ryzhome app
3. Open Rykea Catalog
4. Press National Handicraft
5. Choose the nation where your apartment is
6. Press Startpack
7. Press Buy
(1) It is only possible to view what another player wants to display in their profile. Some people put information in their profiles and some use the roleplay forum to tell their homin's story.
(2) People generally use the Universe chat to announce what they're selling and buying. There's not a way to search all merchants.
(3) To access the furniture in your home, in-game do the following:
1. Shift + W
2. Ryzhome app
3. Open Rykea Catalog
4. Press National Handicraft
5. Choose the nation where your apartment is
6. Press Startpack
7. Press Buy
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Yrkanis | Atys Guardians | ENG, SWE, ITA