Sniffer eggs are found in the sand near warm ocean ruins using a brush, so they can be tricky to find! As for armor decorations, if you're referring to trims, they can be crafted with the aid of a smithing template. Keep hunting! ^AG
Minecraft uses a Microsoft account's privacy and Family Group settings to enable multiplayer/chat access. More info here: help.minecraft.net/hc/en-us/… ^AG
Smithing with Style, right? The 8 smithing templates you need are Spire, Snout, Rib, Ward, Silence, Vex, Tide, and Wayfinder. Can you try reapplying those templates? ^AG
Looks like there may be a connectivity issue. She can try switching to another network or contact her internet service provider to see if they can help figure out what's going on. ^AG
If you believe you've encountered a bug, we recommend voting for the existing report or submitting a bug report if one hasn't been made yet: bugs.mojang.com/secure/Dashb… ^AG
You'll want to ensure that you are running the latest release of Minecraft by selecting it in your Minecraft Launcher. After that, you'll need to explore new chunks to find the latest biomes. ^AG